Beer can't turn into wine (8)
I believe the answer is:
cabernet
'wine' is the definition.
(Cabernet is an example)
'beer can't turn' is the wordplay.
'turn' indicates anagramming the letters.
'beer'+'cant'='beercant'
'beercant' anagrammed gives 'CABERNET'.
'into' is the link.
(Other definitions for cabernet that I've seen before include "Red wine - grape variety" , "Red Bordeaux grape variety" .)