In macelleria il macellaio consiglia carne fresca per il sugo della domenica.

In macelleria is a very common idiomatic way to mean at the butcher’s shop or in a butcher shop in a general sense.

Using nella macelleria would sound more specific: in the butcher shop that we already know about.

So:

• In macelleria = at the butcher’s / in a butcher shop
• Nella macelleria = in the specific butcher shop

Italian often does this with shops and businesses:

• in panetteria = at the bakery
• in farmacia = at the pharmacy
• in macelleria = at the butcher’s

They are related words, but they are not the same thing:

• macelleria = butcher shop
• macellaio = butcher

So in the sentence:

• In macelleria = at the butcher shop
• il macellaio = the butcher

This kind of shop/person pair is very common in Italian:

• panetteria / panettiere = bakery / baker
• pasticceria / pasticciere = pastry shop / pastry chef

Because il macellaio refers to a specific person in the sentence: the butcher.

But carne fresca is being used in a general, uncountable sense: fresh meat. In Italian, mass nouns often appear without an article when you mean them generally.

So:

• il macellaio = the butcher
• carne fresca = fresh meat

If you wanted to refer to a specific piece or batch of meat, you might use an article:

• la carne fresca che hai comprato = the fresh meat that you bought

Consiglia is the third-person singular present tense of consigliare.

So it means:

• he/she recommends
• he/she advises

In this sentence, the subject is il macellaio, so:

• il macellaio consiglia = the butcher recommends

You could also see the verb used in other patterns:

• Consiglio questo vino. = I recommend this wine.
• Ti consiglio questo vino. = I recommend this wine to you.
• Ti consiglio di aspettare. = I advise you to wait.

In Italian, adjectives usually come after the noun, especially when they describe a straightforward quality like freshness, color, size, or origin.

So the normal order is:

• carne fresca = fresh meat

Putting the adjective before the noun is possible in some cases, but it often sounds more literary, emphatic, or changes the nuance. For ordinary everyday language, carne fresca is the natural choice.

Here per means for, in the sense of intended for or to make.

So:

• carne fresca per il sugo = fresh meat for the sauce

The butcher is recommending meat that will be used to prepare the sauce.

This is different from al sugo:

• carne al sugo = meat in sauce / meat served with sauce
• carne per il sugo = meat to make the sauce

That is an important difference.

Della domenica literally means of Sunday, but in natural English it means something like:

• for Sunday
• the Sunday sauce
• the sauce for Sunday lunch

Here, della is just the contraction of di + la.

So:

• della domenica = of Sunday / for Sunday

This is different from di domenica, which usually means on Sundays in a habitual sense.

Compare:

• il pranzo della domenica = Sunday lunch
• di domenica mangiamo tardi = on Sundays we eat late

So in your sentence, della domenica is not about a repeated habit; it refers to the traditional Sunday meal.

The word order is fairly flexible, but the version given sounds natural and well-balanced.

In macelleria il macellaio consiglia carne fresca per il sugo della domenica starts with the place, which sets the scene first: At the butcher’s...

You could also say:

• Il macellaio consiglia carne fresca per il sugo della domenica.

This is also correct, but it removes the initial setting.

Italian often moves elements around for emphasis or style more freely than English, but not every possible order sounds equally natural.

Because Italian normally does not need subject pronouns unless you want emphasis or contrast.

The verb ending already tells you the person:

• consiglio = I recommend
• consigli = you recommend
• consiglia = he/she recommends

And in this sentence, the noun il macellaio already makes the subject clear. So adding lui would usually be unnecessary.

Italian often sounds more natural without subject pronouns:

• Il macellaio consiglia... = natural
• Lui il macellaio consiglia... = unnatural in normal use

Not always. Sugo is a broad word for a sauce used with pasta or other dishes, and the exact type depends on context.

In a sentence about the butcher recommending meat, sugo strongly suggests a sauce made with meat, or at least a sauce in which meat plays an important role.

So here it is best understood as the sauce for Sunday pasta/lunch, not necessarily just plain tomato sauce.

Because the opening phrase is short, and in Italian a comma is often omitted after a brief introductory expression.

So:

• In macelleria il macellaio consiglia... = perfectly normal

You could add a comma for rhythm or emphasis:

• In macelleria, il macellaio consiglia...

But it is not required. Both are possible, and the version without the comma is very natural.