Game of golf a rep organised (8)
I believe the answer is:
leapfrog
'game' is the definition.
(leapfrog is a kind of game)
'golf a rep organised' is the wordplay.
'organised' is an anagram indicator.
'golf'+'a'+'rep'='golfarep'
'golfarep' with letters rearranged gives 'LEAPFROG'.
'of' acts as a link.
(Other definitions for leapfrog that I've seen before include "Children's game of jumping over each other" , "bound over" , "Child's game of jumping over other children" , "Game in which players vault over each other" , "Advance by jumps" .)