Whisper to a team (5)
I believe the answer is:
aside
'whisper' is the definition.
'a team' is the wordplay.
'team' becomes 'side' (both can mean a sports team).
'a'+'side'='ASIDE'
'to' acts as a link.
(Other definitions for aside that I've seen before include "Ideas (anag)" , "Apart; incidental remark" , "Line spoken to theatre audience" , "Out of other people's hearing" , "In reserve -- confidential remark" .)