The team I had in the Kentish area (4)
I believe the answer is:
side
'the team' is the definition.
(both can mean a sports team)
'i had in the kentish area' is the wordplay.
'i had' becomes 'i'd' (I'd).
'in the' indicates putting letters inside.
'kentish area' becomes 'SE' (South East of England).
'id' put inside 'se' is 'SIDE'.
(Other definitions for side that I've seen before include "Dies (anag)" , "Aspect, sports team" , "perspective" , "Affectation" , "Pretentious air" .)