Sparkling wine region (4)
I believe the answer is:
asti
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sparkling wine region</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 asti that I've seen before include "Sparkling white wine" , "White wine named after a town in Piedmont" , "Italian drunk" , "Italian town producing sparkling wine" , "Italian white wine" .)