Beastie imports Piedmont booze (4)
I believe the answer is:
'piedmont booze' is the definition.
The definition suggests a singular noun which matches the answer.
'beastie imports' is the wordplay.
'ASTI' is hidden in amongst the letters.
However, I am uncertain how this is indicated.
Can you help me to learn more?
(Other definitions for asti that I've seen before include "Sparkling white wine" , "Fizzy wine" , "Source of fizz" , "Piedmont wine city, SE of Turin" , "Italian town producing sparkling wine" .)