Wine quantity not uniform? Bad business (11)
I believe the answer is:
amontillado
'wine' is the definition.
(amontillado is a kind of wine)
'quantity not uniform? bad business' is the wordplay.
'quantity' becomes 'amount' (amount is a kind of quantity).
'not' is a deletion indicator.
'uniform?' becomes 'U' (phonetic alphabet: alpha, bravo, charlie etc.).
'bad' becomes 'ill' (associated in meaning).
'business' becomes 'ado' (both can mean happenings or commotion).
'amount' with 'u' taken away is 'amont'.
'amont'+'ill'+'ado'='AMONTILLADO'
(Other definitions for amontillado that I've seen before include "Medium-dry sherry" , "Medium dry sherry" , "booze" , "Drink" , "Kind of sherry" .)