Organ (4)
(Other definitions for nose that I've seen before include "Facial part" , "It detects by smell" , "Hooter" , "Cyrano's large feature" , "Front of an aircraft" .)
(Other definitions for ear that I've seen before include "Part of a cereal plant containing the seeds" , "Heed" , "Lug (colloq.)" , "A corny bit" , "Fruiting head of corn" .)
(Other definitions for donor that I've seen before include "One who gives, perhaps blood" , "patron" , "One who gives, maybe blood" , "Someone providing" , "Supporter" .)
'organ' is the definition.
(heart is a kind of organ)
This is all the clue.
(Other definitions for heart that I've seen before include "Pumping organ" , "Centre; core" , "Cardiac courage" , "Cardiac organ" , "Crux" .)
'organ' is the definition.
(liver is a kind of organ)
This is all the clue.
(Other definitions for liver that I've seen before include "Internal organ" , "One extant" , "Detoxifying organ" , "Hepatic organ" , "Large gland" .)
(Other definitions for kidney that I've seen before include "Renal organ" , "Organ at back of abdomen" , "Organ associated with steak" , "Organ filtering waste with water from blood" , "Excretory organ" .)