Greek wine – some clarets in Athens? (7)
I believe the answer is:
retsina
'greek wine' is the definition.
(I've seen this in another clue)
'some clarets in athens?' is the wordplay.
'some' indicates a hidden word (some parts of the word are used).
'RETSINA' is hidden within 'clarets in athens'.
(Other definitions for retsina that I've seen before include "Flavoured Greek white wine - nastier brand" , "Oily-tasting Greek white wine" , "Greek drink" , "Nastier (anag) - white (or rose) wine" , "Nastier (anag) - Greek wine" .)