Jump parole to mingle with footballing sides (8)
I believe the answer is:
leapfrog
'jump' is the definition.
(I know that leapfrog is a type of jump)
'parole to mingle with footballing sides' is the wordplay.
'to mingle with' indicates anagramming the letters (letters mix and mingle around).
'sides' means to remove the middle letters (only the letters on the sides are used).
'footballing' with its centre removed is 'fg'.
'parole' anagrammed with 'fg' makes 'LEAPFROG'.
(Other definitions for leapfrog that I've seen before include "Child's game of jumping over other children" , "Game in which players vault over each other" , "Vaulting game" , "bound over" , "Advance by jumps" .)