Sparkling wine which must be made entirely from Moscato Bianco grapes (4)

I believe the answer is:

asti

(Other definitions for asti that I've seen before include "Sparkling white wine" , "Source of fizz" , "- spumante, It. wine" , "Sparkling drink" , "Fizzy wine" .)

I've seen this clue in The Times and The Sunday Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.