Pub with no end of sherry wine (6)
I believe the answer is:
barsac
'wine' is the definition.
(type of wine)
'pub with no end of sherry' is the wordplay.
'pub' becomes 'bar' (both are drinking establishments).
'with no end of' means to remove the last letter.
'sherry' becomes 'sack'.
'sack' with its last letter taken away is 'sac'.
'bar'+'sac'='BARSAC'
(Other definitions for barsac that I've seen before include "some from France" , "Sweet Bordeaux wine" , "French wine" , "Scarab (anag) - sweet white wine" , "18 [WINE]" .)