A sound return (4)
I believe the answer is:
echo
I believe this clue is a double definition.
'a sound' is the first definition.
(thesaurus)
'return' is the second definition.
(I have seen 'Return of sound' mean 'echo' so perhaps 'return' could also mean 'echo')
(Other definitions for echo that I've seen before include "Say again or imitate" , "Nymph; E (radio comms.)" , "Reflection of sound wave" , "Parrot" , "Reminder" .)