Italian wine region (4)
I believe the answer is:
asti
'italian wine region' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for asti that I've seen before include "Sparkling wine named after an Italian Piedmont town" , "It's a (anag) - wine" , "White wine named after a town in Piedmont" , "Italian white wine" , "Sparkling drink" .)