Church, different, with a London team? (7)
I believe the answer is:
chelsea
'london team?' is the definition.
(London football club)
'church different with a' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'different' becomes 'else' ('else' can be a synonym of 'different').
'with' says to put letters next to each other.
'ch'+'else'+'a'='CHELSEA'
(Other definitions for chelsea that I've seen before include "Team in blue" , "London district and football club" , "Bunny" , "upmarket part of London" , "London Blues" .)