Wine region of Italy (4)
I believe the answer is:
asti
'wine region of italy' 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 white wine" , "18" , "Capital of a north-west Italian province, known for its sparking wine" , "Italian town, famous for its wine" , "Italian product" .)