Team following champion, behind (8)
I believe the answer is:
backside
'behind' is the definition.
('backside' can be a synonym of 'behind')
'team following champion' is the wordplay.
'team' becomes 'side' (I've seen this before).
'following' says to put letters next to each other.
'champion' becomes 'back' (I've seen this in other clues).
'side' after 'back' is 'BACKSIDE'.
(Other definitions for backside that I've seen before include "Seat" , "Hind part" , "Bottom" , "Rear" , "Behind" .)