Team we back with credit (4)
I believe the answer is:
crew
'team' is the definition.
(crew is a kind of team)
'we back with credit' is the wordplay.
'back' says the letters should be written in reverse.
'with' means one lot of letters go next to another.
'credit' becomes 'cr'.
'we' backwards is 'ew'.
'ew' after 'cr' is 'CREW'.
(Other definitions for crew that I've seen before include "Squad" , "boastful" , "Ship or aircraft staff" , "Force" , "They operate ship or aircraft" .)