Sport with four-player teams (4)
I believe the answer is:
polo
'sport with four-player teams' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for polo that I've seen before include "Horseback sport" , "Equestrian sport" , "Oriental visitor < ? Sucker having a hole" , "Marco" , "jersey" .)