Team about to take on inventor (6)
I believe the answer is:
edison
'inventor' is the definition.
(Edison is an example)
'team about to take on' is the wordplay.
'team' becomes 'side' (both can mean a sports team).
'about' is a reversal indicator.
'to take' is a charade indicator (letters next to each other).
'side' written backwards gives 'edis'.
'edis'+'on'='EDISON'
(Other definitions for edison that I've seen before include "Thomas ......, famous American inventor" , "scientist" , "Inventor of the carbon filament lamp, d. 1931" , "Prolific inventor" , "No side to this american inventor" .)