Jumping game (8)
I believe the answer is:
leapfrog
'jumping game' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for leapfrog that I've seen before include "Overtake in position" , "Vaulting game" , "Child's game of jumping over other children" , "bound over" , "Child's game of jumping over competitors" .)