Beat back game (4)
I believe the answer is:
golf
'game' is the definition.
(golf game is a kind of game)
'beat back' is the wordplay.
'beat' becomes 'flog' (flogging is a kind of beating).
'back' shows that the letters should be reversed in order.
'flog' in reverse letter order is 'GOLF'.
(Other definitions for golf that I've seen before include "Sport with bunkers" , "Game with clubs" , "Game with 18 holes" , "Rory McIlroy's game" , "Open-air game" .)