Wine in joint? (4)
I believe the answer is:
hock
I believe this is a double definition.
'wine' is the first definition.
(I know that hock is a type of white wine)
'joint?' is the second definition.
(joint of meat)
'in' is the link.
(Other definitions for hock that I've seen before include "Leg joint on horse e.g." , "A wine; part of horse's leg" , "Pawn < some ham" , "Dry Rhine wine" , "Buy property, say" .)