Fan finds great container for wine (9)
I believe the answer is:
supporter
'fan' is the definition.
(eg a fan of a football team)
'great container for wine' is the wordplay.
'great' becomes 'super' (both can mean excellent).
'container for' means one lot of letters goes inside another.
'wine' becomes 'port' (port is a kind of wine).
'super' going around 'port' is 'SUPPORTER'.
'finds' acts as a link.
(Other definitions for supporter that I've seen before include "Second" , "Champion" , "angel" , "Advocate" , "Stay" .)