Remark to a team (5)
I believe the answer is:
aside
'remark' is the definition.
(I have seen 'Confidential remark' mean 'aside' so perhaps 'remark' could also mean 'aside')
'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 "(Pushed) out of the way" , "Line spoken to theatre audience" , "kept in reserve" , "Actor's covert line" , "Quiet words spoken" .)