Preserved in vinegar or brine (7)
I believe the answer is:
pickled
'preserved in vinegar or brine' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for pickled that I've seen before include "Preserved in liquid" , "Blotto" , "Preserved in vinegar or brine" , "Soused" , "Drunk (as a gherkin?)" .)