Jump or leap two for sport (5,4)
I believe the answer is:
water polo
'sport' is the definition.
(I know that water polo is a type of water sport)
'jump or leap two' is the wordplay.
'jump' is an anagram indicator (I've seen 'jumping' mean this).
'or'+'leap'+'two'='orleaptwo'
'orleaptwo' with letters rearranged gives 'WATER-POLO'.
'for' acts as a link.
(Other definitions for water polo that I've seen before include "Sport for swimmers" , "Team sport played in a swimming pool" , "Team sport with wet participants" , "Game played by teams of swimmers with large ball" , "Swimming pool game" .)