His camera captures racket (4)
I believe the answer is:
scam
'racket' is the definition.
(I've seen this in another clue)
'his camera captures' is the wordplay.
'captures' indicates the answer is hidden within the clue (the answer is trapped within the clue).
'SCAM' is hidden within 'his camera'.
(Other definitions for scam that I've seen before include "Rip off" , "'A con, deception (4)'" , "A slangy swindle or fraud" , "Dubious operation" , "rook" .)