Support team in rear (8)
I believe the answer is:
backside
'rear' is the definition.
('backside' can be a synonym of 'rear')
'support team' is the wordplay.
'support' becomes 'back' (back is a kind of support).
'team' becomes 'side' (I've seen this before).
'back'+'side'='BACKSIDE'
'in' acts as a link.
(Other definitions for backside that I've seen before include "Rear" , "Behind" , "Seat" , "Buttocks" , "Hind part" .)