Repeated sound from the choir (4)
I believe the answer is:
echo
'repeated sound' is the definition.
(I've seen this before)
'from the choir' is the wordplay.
'from' indicates a hidden word.
'ECHO' is hidden within 'the choir'.
(Other definitions for echo that I've seen before include "Repeating of sound" , "Nymph; E (radio comms.)" , "Nymph whose love Narcissus spurned" , "Reflect in Czechoslovakia" , "Before foxtrot" .)