Spanish sparkling wine (4)
I believe the answer is:
cava
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">spanish sparkling wine</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for cava that I've seen before include "Sparkler" , "Spanish sparkling white wine" , "sparkling drink" , "Spanish fizz" , "Spanish bubbly" .)