Listener's noted warm heart (3)
I believe the answer is:
ear
'listener's' is the definition.
(body part which hears or listens)
'noted warm heart' is the wordplay.
'EAR' is hidden in amongst the letters.
But, I'm unsure how this is indicated.
Can you help me to learn more?
(Other definitions for ear that I've seen before include "Auricle" , "'Give every man thine ..., but few thy voice'/Hamlet" , "Place for a plug" , "A corny bit" , "Go astray" .)