Sight at a winery (3)
I believe the answer is:
vat
'sight at a winery' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for vat that I've seen before include "Liquid storage receptacle" , "Large container for liquid" , "Large tank or vessel" , "subject of 17, 8 [CHANCELLORS STATEMENT]" , "Large barrel" .)