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' means one lot of letters goes inside another.
'kentish area' becomes 'SE' (South East of England).
'id' put within 'se' is 'SIDE'.
(Other definitions for side that I've seen before include "Dies (anag)" , "Aspect, sports team" , "perspective" , "Affectation" , "Pretentious air" .)