Bottom team after defender (8)
I believe the answer is:
backside
'bottom' is the definition.
(I've seen this before)
'team after defender' is the wordplay.
'team' becomes 'side' (I've seen this before).
'after' says to put letters next to each other.
'defender' becomes 'back' (I've seen this before).
'side' put after 'back' is 'BACKSIDE'.
(Other definitions for backside that I've seen before include "Hind part" , "Seat" , "Buttocks" , "Rear" , "Behind" .)