Ran site shifting wine (7)
I believe the answer is:
retsina
'wine' is the definition.
(type of Greek wine)
'ran site shifting' is the wordplay.
'shifting' indicates an anagram.
'ran'+'site'='ransite'
'ransite' anagrammed gives 'RETSINA'.
(Other definitions for retsina that I've seen before include "Greek drink" , "Greek resin-flavoured wine" , "Nastier (anag) - Greek wine" , "Greek wine - nastier sort" , "Type of Greek wine" .)