Those of the church are clearly not hell's (5)

I believe the answer is:
bells
I'm afraid I can't even guess how this answer relates to the clue.
Can you help me to learn more?
(Other definitions for bells that I've seen before include "Summoned by -- (Betjeman)" , "Those ringing in the New Year" , "Scotch?" , "Chimes" , "Musical instruments" .)