Amusement with small wine (5)
I believe the answer is:
sport
'amusement' is the definition.
(thesaurus)
'small wine' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'wine' becomes 'port' (port is a kind of wine).
's'+'port'='SPORT'
'with' acts as a link.
(Other definitions for sport that I've seen before include "Put on" , "Physical activity" , "Games" , "eg Tennis" , "Fun in ports" .)