A game to leap around in (6)
I believe the answer is:
pelota
'in' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'a game to leap' is the wordplay.
'a game' indicates an anagram (a game or puzzle of the letters).
'to'+'leap'='toleap'
'toleap' anagrammed gives 'PELOTA'.
'around' acts as a link.
Can you help me to learn more?
(Other definitions for pelota that I've seen before include "Basque ball-game" , "Spanish game at Opel" , "Basque ball game" , "Basque sport" , "SPORT/GAME" .)