Kannst du den Straßennamen noch einmal buchstabieren?

you

Breakdown of Kannst du den Straßennamen noch einmal buchstabieren?

• können: can
• den: the; (masculine, accusative)
• der Straßenname: the street name

Questions & Answers about Kannst du den Straßennamen noch einmal buchstabieren?

Why does it start with Kannst du—what’s the word order in this question?

German yes/no questions typically put the finite verb first.
So instead of Du kannst ... (statement), you get Kannst du ...? (question).
The subject du comes right after the verb.

Why is it den Straßennamen and not der Straßennamen?

Because buchstabieren takes a direct object, so the street name is in the accusative case.

• Nominative: der Straßenname (the street name)
• Accusative: den Straßennamen (the street name, as the object)

Why does Name change to Namen here?

Name is a weak masculine noun (n‑declension). That means it usually adds -n / -en in cases other than nominative singular.

• der Name (nominative)
• den Namen (accusative)
  So with the compound Straßenname, it becomes den Straßennamen.

What exactly is the function/meaning of noch einmal in this sentence?