Church caretaker, initially rather on edge (6)
I believe the answer is:
verger
'church caretaker' is the definition.
(I've seen this before)
'initially rather on edge' is the wordplay.
I cannot really understand how this works, but
'edge' could be 'verge' (verge is a kind of edge) and 'verge' is found in the answer.
A single letter 'r' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for verger that I've seen before include "Church caretaker and attendant" , "Church official" , "Church officer" .)