Religious offshoot (4)
I believe the answer is:
sect
'religious 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 "Small group with own religious beliefs" , "Group, faction" , "Dissenting clique of a religion" , "Body of followers" , "Nonconformist faction" .)