Rest feet, by the sound of it (5)
I believe the answer is:
pause
'rest' is the definition.
(thesaurus)
'feet by the sound of it' is the wordplay.
'feet' becomes 'paws' (paw is a kind of foot).
'by the sound of it' shows a homophone (sound like).
'paws' is a homophone of 'PAUSE'.
(Other definitions for pause that I've seen before include "Stoppage" , "Rest" , "Temporary cessation" , "Temporary interruption" , "Temporary stop or hesitation" .)