Italian city return for Greek (5)

I believe the answer is:

attic

I'm a little stuck... Click here to teach me more about this clue!

'for greek' is the definition.
(from ancient Athens or Attica)

I cannot understand how the rest of the clue works.

(Other definitions for attic that I've seen before include "Floor" , "Top level" , "top-flight accommodation" , "Ancient Greek dialect - top room" , "Room at the top of a house" .)

I've seen this clue in The Globe and Mail.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.