Church offshoot (4)
I believe the answer is:
sect
'church offshoot' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sect that I've seen before include "Dissenting division of a larger religious group" , "Dissenting body" , "Religious splinter group" , "Subdivision of a larger religious group" , "Dissenting clique of a religion" .)