Hearsay about organs (4)
I believe the answer is:
ears
'organs' is the definition.
(ear is a kind of organ)
'hearsay about' is the wordplay.
'about' indicates a hidden word (the clue goes around or about the answer).
'EARS' is hidden within 'hearsay'.
(Other definitions for ears that I've seen before include "Listening organs" , "'''Friends, Romans, countrymen, lend me your ...'' (Julius Caesar) (4)'" , "Lugholes" , "''He who has ... to hear, let him hear'' (bible)" , "Walls are said to have them" .)