Dry (champagne) (4)
I believe the answer is:
brut
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">dry champagne</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 brut that I've seen before include "one type of champagne" , "Dry (of champagne)" , "(Of sparkling wines) very dry" , "(Of sparkling wine) extremely dry" , "Unsweetened; very dry" .)