Wine vintage (3)
I believe the answer is:
cru
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wine vintage</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for cru that I've seen before include "Growth place of a French wine" , "Source of alcohol" , "Grounds for eg red" , "French vineyard (and the wine from it)" , "Superior vineyard" .)