Hearsay about organs (4)
I believe the answer is:
'organs' is the definition.
(ear is a kind of organ)
'hearsay about' is the wordplay.
'about' indicates a hidden word.
'EARS' is hidden in the letters of 'hearsay'.
(Other definitions for ears that I've seen before include "Corn; organs", "Spikes of corn", "Sense organs", "Listening organs", "Lugs (colloq.)".)