Ring of bells (4)
I believe the answer is:
peal
'ring of bells' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for peal that I've seen before include "Ring (of bell), clap (of thunder)" , "Loud ringing of bells" , "Chime" , "Sound of bells, thunder" , "Sound of ringing bells" .)