Police aim to do this sport (6,7)
I believe the answer is:
squash rackets
'this sport' is the definition.
(squash rackets is a kind of sport)
I don't understand how the remainder of the clue works.
(Other definitions for squash rackets that I've seen before include "put an end to fraudulent schemes" , "they'll be needed in court" , "sport" , "Game" , "Court action" .)