Coxswain's sport (4)
I believe the answer is:
crew
'coxswain's sport' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for crew that I've seen before include "Ship's or aircraft's staff" , "Ship/plane workers" , "Squad" , "Force" , "This male hair style is closely cropped" .)