Hearsay about body part (3)
I believe the answer is:
ear
'body part' is the definition.
(ear is a part of the body)
'hearsay about' is the wordplay.
'about' says the answer is hidden in the clue (the clue goes around or about the answer).
'EAR' is hidden in the letters of 'hearsay'.
(Other definitions for ear that I've seen before include "Organ inside heart" , "Spike of, eg, corn" , "Part of corn plant" , "Seed-bearing spike" , "'Give every man thine ..., but few thy voice'/Hamlet" .)