Sport in dispute (6)
I believe the answer is:
rowing
This clue is a double definition.
'sport' is the first definition.
(rowing is a kind of sport)
'in dispute' is the second definition.
(I've seen this before)
(Other definitions for rowing that I've seen before include "Using oars" , "Steven Redgrave's sport" , "Olympic event" , "Sculling sport?" , "Sport associated with Henley" .)