To leap around in a game (6)
I believe the answer is:
pelota
'a game' is the definition.
(pelota is a kind of game)
'to leap around' is the wordplay.
'around' is an anagram indicator.
'to'+'leap'='toleap'
'toleap' is an anagram of 'PELOTA'.
'in' is the link.
(Other definitions for pelota that I've seen before include "Basque ball-game" , "Spanish game played with a ball and wickerwork racket" , "Basque sport" , "Spanish game at Opel" , "SPORT/GAME" .)