Clienta cere înlocuirea.

The base form is clientă, which means a female client / a female customer.

Romanian usually puts the definite article at the end of the noun instead of using a separate word like English the. So:

• clientă = a female customer
• clienta = the female customer

So in this sentence, clienta is the definite singular form.

Yes. Clienta is specifically feminine.

Compare:

• clientul = the male customer / the customer
• clienta = the female customer

So this sentence is clearly referring to a woman.

Cere is the 3rd person singular present tense of the verb a cere.

That means it matches he / she / it:

• eu cer = I ask/request
• tu ceri = you ask/request
• el/ea cere = he/she asks/requests

In this sentence, clienta cere means the customer asks/requests.

Depending on context, a cere can mean:

• to ask for
• to request
• sometimes to demand

Because Romanian a cere usually takes a direct object.

English often says ask for something, but Romanian commonly just says ask/request something directly:

• cere ajutor = asks for help
• cere bani = asks for money
• cere înlocuirea = asks for / requests the replacement

So nothing is missing here. This is normal Romanian grammar.

Înlocuirea is a noun meaning the replacement.

It comes from the verb:

• a înlocui = to replace

From that verb you get the noun:

• înlocuire = replacement
• înlocuirea = the replacement

So this is an example of a noun made from a verb.

This is the Romanian definite article added to a feminine noun ending in -e.

So:

• înlocuire = replacement
• înlocuirea = the replacement

You can think of it as the noun taking an ending that means the.

This pattern is common:

• schimbare → schimbarea
• cerere → cererea
• înlocuire → înlocuirea

Romanian often uses the definite form with action nouns in places where English may use:

• a replacement
• or even just replacement

So cere înlocuirea can be perfectly natural Romanian even if English might say requests a replacement.

If you wanted an explicitly indefinite idea, Romanian could use o înlocuire, but in many real contexts înlocuirea sounds more idiomatic, especially when the replacement is understood as a specific remedy or procedure.

Yes. This is the normal subject–verb–object order:

• Clienta = subject
• cere = verb
• înlocuirea = object

So it is a very standard, neutral Romanian sentence structure.

Romanian word order can be more flexible than English, but Clienta cere înlocuirea is the straightforward version.

Because pe is normally used with personal or animate direct objects, especially definite ones.

Here, înlocuirea is not a person. It is an inanimate/abstract noun, so pe is not used.

Compare:

• Văd clienta. = I see the female customer.
  Here pe would often appear in full, standard usage: O văd pe clienta... in certain constructions.

But:

• cere înlocuirea = requests the replacement
  No pe, because înlocuirea is not a person.

A few useful points:

• c before e in cere sounds like English ch
• so cere is roughly CHE-reh
• î in înlocuirea is a specifically Romanian vowel sound with no exact English equivalent

A rough pronunciation guide for the whole sentence is:

• cli-EN-ta CHE-reh în-lo-ku-EE-rea

That is only approximate, but it will point you in the right direction.