Joint; wine (4)
I believe the answer is:
hock
I believe this clue is a double definition.
'joint' is the first definition.
(joint of meat)
'wine' is the second definition.
(hock is a kind of wine)
(Other definitions for hock that I've seen before include "Animal joint - German white wine" , "Dry wine; joint; pawn" , "Dry Rhine wine" , "Leg joint on horse e.g." , "Rhine wine -- horse joint" .)