Soccer team (6)
I believe the answer is:
eleven
'soccer team' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for eleven that I've seen before include "football team, for example" , "Smallest positive three-syllable integer" , "Football or cricket team?" , "Number, on a team maybe" , "Number on a side (6)" .)