Jumper for playing golf (4)
I believe the answer is:
frog
'jumper' is the definition.
(something which jumps)
'for playing golf' is the wordplay.
'playing' indicates anagramming the letters.
'golf' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'for' with letters rearranged gives 'fro'.
'fro'+'g'='FROG'
(Other definitions for frog that I've seen before include "in grass?" , "Long-legged amphibian" , "Amphibian - depression in brick" , "Obstruction, in throat" , "An amphibian; a track plate" .)