Wrong trap set up for game (6)
I believe the answer is:
tennis
'game' is the definition.
(tennis is a kind of game)
'wrong trap set up' is the wordplay.
'wrong' becomes 'sin' (I've seen this before).
'trap' becomes 'net' (net is a kind of trap).
'set up' says the letters should be written backwards.
'sin'+'net'='sinnet'
'sinnet' back-to-front is 'TENNIS'.
'for' is the link.
(Other definitions for tennis that I've seen before include "event" , "Wimbledon sport" , "Ball game with a net" , "Sent in, oddly, to play a sport" , "Game of the Williams sisters and of Roger Federer" .)