French vineyard (3)
I believe the answer is:
cru
'french vineyard' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for cru that I've seen before include "French vineyard or group" , "French vineyard (and the wine from it)" , "Vintage, as applied to wine" , "Source of alcohol" , "(Quality) vineyard; sounds like ship's men" .)