More than one team takes part (5)
I believe the answer is:
sides
This clue is a triple definition!
'more than one team' is the first definition.
(I've seen this before)
'takes' is the second definition.
(siding is a kind of taking)
'part' is the third definition.
(I know this)
(Other definitions for sides that I've seen before include "Angles" , "camps" , "Flanks, or opposing teams" , "Sports teams" , "Outer edges, left and right" .)