A garret in Athens (5)

I believe the answer is:

attic

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'a garret' is the definition.
('attic' can be a synonym of 'garret')

I don't understand the rest of the clue.

(Other definitions for attic that I've seen before include "Classical" , "Upstairs room" , "Dusty room" , "Small room at the top" , "Classically elegant" .)

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

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