Wine company accepts credit cards (7)
I believe the answer is:
plastic
'credit cards' is the definition.
(I've seen this before)
'wine company accepts' is the wordplay.
'wine' becomes 'asti' (Italian wine).
'company' becomes 'plc' (abbreviation for public limited company).
'accepts' indicates putting letters inside.
'asti' inserted within 'plc' is 'PLASTIC'.
(Other definitions for plastic that I've seen before include "Compliant" , "Credit and debit cards" , "non-metallic material" , "Easily shaped/moulded" , "credit may be on it" .)