Listening organs (4)
I believe the answer is:
ears
'listening 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 "Shakespeare 'Friends, Romans, countrymen, lend me your . . . .'" , "Locations for buds or studs?" , "Listening organs" , "Heads of corn" , "Auditors" .)