Drink wine as champion (7)
I believe the answer is:
support
'champion' is the definition.
(I've seen this before)
'drink wine' is the wordplay.
'drink' becomes 'sup' (I've seen this before**).
'wine' becomes 'port' (port is a kind of wine).
'sup'+'port'='SUPPORT'
'as' acts as a link.
(Other definitions for support that I've seen before include "Bear the weight of (something)" , "strengthen" , "base" , "Stay" , "Provide with food, clothing and shelter, or encouragement" .)