Core — scent (7)
I believe the answer is:
essence
This clue is a double definition.
'core' is the first definition.
(I know that core can be written as essence)
'scent' is the second definition.
(I've seen this in another clue)
(Other definitions for essence that I've seen before include "Perfume; core" , "SE scene (anag.)" , "Extract; intrinsic nature" , "Core, most vital part" , "Key" .)