A team out of earshot (5)
I believe the answer is:
aside
'out of earshot' is the definition.
(thesaurus)
'a team' is the wordplay.
'team' becomes 'side' (both can mean a sports team).
'a'+'side'='ASIDE'
(Other definitions for aside that I've seen before include "In reserve; actor's remark to audience" , "secretly" , "Words spoken apart in an undertone" , "Actor's line directed solely to audience" , "Ideas (anag)" .)