Ring of wires on a telephone (8)
I believe the answer is:
resonate
'ring' is the definition.
(to resonate is to ring out)
'of wires on a telephone' is the wordplay.
'of' indicates the answer is hidden within the clue.
'RESONATE' is hidden in the letters of 'wires on a telephone'.
(Other definitions for resonate that I've seen before include "Continue to sound" , "Sound deeply and clearly" , "Reverberate" , "Produce a reverberating sound" , "make a vibrating effect" .)