Recognises, it’s said, facial feature (4)
I believe the answer is:
nose
'facial feature' is the definition.
(part of the face)
'recognises it's said' is the wordplay.
'recognises' becomes 'knows' (know can mean to recognise someone).
'it's said' indicates a 'sounds like' (homophone) clue.
'knows' sounds like 'NOSE'.
(Other definitions for nose that I've seen before include "Olfactory organ" , "Schnozzle" , "Facial organ" , "Organ of smell" , "Organ of face" .)