Cafe come-on (5)
I believe the answer is:
aroma
'cafe come-on' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for aroma that I've seen before include "A pleasant smell as of food" , "Distinctive odour" , "Food fragrance" , "Stink" , "Scent - fragrance" .)