Sort of saddle for a team event? (4)
I believe the answer is:
side
'event?' is the definition.
(side is a kind of event)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for side that I've seen before include "Dies (anag)" , "Bank" , "Football team" , "camp" , "pretentious attitude" .)