Some meat sandwiches left for a bunch of zealots (4)
I believe the answer is:
cult
'a bunch of zealots' is the definition.
(I've seen this in another clue)
'some meat sandwiches left' is the wordplay.
'some meat' becomes 'cut' (cut is a kind of meat).
'sandwiches' means one lot of letters goes inside another (goes on either side like a sandwich).
'left' becomes 'l' (common abbreviation).
'cut' enclosing 'l' is 'CULT'.
'for' is the link.
(Other definitions for cult that I've seen before include "Strange religious group" , "Popular cause, fashion" , "Esoteric religion" , "System of religious worship, may be for minority" , "Group with system of formal worship" .)