Hearing organs (4)
I believe the answer is:
ears
'hearing organs' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ears that I've seen before include "One's hearing aids" , "Lugholes" , "'''Friends, Romans, countrymen, lend me your ...'' (Julius Caesar) (4)'" , "Heads of corn" , "Sense organs" .)