Feature is aware of the facts, we hear? (4)
I believe the answer is:
nose
'feature' is the definition.
(facial feature)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for nose that I've seen before include "Facial feature" , "Snout" , "It detects by smell" , "Olfactory organ" , "Faculty for detecting" .)