Slip catch turned game (6)
I believe the answer is:
tennis
'game' is the definition.
(tennis is a kind of game)
'slip catch turned' is the wordplay.
'slip' becomes 'sin' (both can mean a mistake or failing).
'catch' becomes 'net' (netting is a kind of catching).
'turned' shows that the letters should be reversed in order.
'sin'+'net'='sinnet'
'sinnet' in reverse letter order is 'TENNIS'.
(Other definitions for tennis that I've seen before include "Sport on a court" , "Ball sport" , "Evil trap set up for game" , "- elbow; - shoe" , "Wimbledon game" .)