Fearless competition (4)
I believe the answer is:
game
I believe this clue is a double definition.
'fearless' is the first definition.
(similar in meaning)
'competition' is the second definition.
(game is a kind of competition)
(Other definitions for game that I've seen before include "Pastime - quarry" , "Willing; plucky" , "Play, competition and hunted animals" , "meat from hunting" , "Creatures hunted for sport" .)