Crippled in sport (4)
I believe the answer is:
game
I believe this clue is a double definition.
'crippled' is the first definition.
(thesaurus)
'in sport' is the second definition.
(I know that game has the is part of game-based sport)
(Other definitions for game that I've seen before include "What might get hung" , "Hunted wildlife" , "venison, say" , "Animals hunted for food" , "Sport - willing - lame" .)