Aroma detector (4)
I believe the answer is:
nose
'aroma detector' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for nose that I've seen before include "Conk (slang)" , "See 1" , "Small margin of victory" , "Bouquet of wine; beak" , "Aroma of wine" .)