Greek character opposed to wine (7)
I believe the answer is:
chianti
'to wine' is the definition.
(Chianti is an example)
'greek character opposed' is the wordplay.
'greek character' becomes 'chi' (letter from the Greek alphabet).
'opposed' becomes 'anti' (similar in meaning).
'chi'+'anti'='CHIANTI'
(Other definitions for chianti that I've seen before include "Chain it to popular Italian wine" , "Italian wine - mountain range" , "Wine produced in Tuscany" , "I can hit for popular Italian wine" , "Popular dry red wine of Tuscany" .)