Champagne grape (5)
I believe the answer is:
pinot
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">champagne grape</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for pinot that I've seen before include "Wine-making grape" , "Red or white ingredient" , "Kind of wine grape" , "Variety of wine grape" , "wine supplier?" .)