Bottle for perfume that's disgusting, we hear (4)
I believe the answer is:
vial
'bottle for perfume' is the definition.
(perfume may be stored in a vial)
'disgusting we hear' is the wordplay.
'disgusting' becomes 'vile' (I've seen this before).
'we hear' shows a homophone (sound like).
'vile' sounds like 'VIAL'.
'that's' acts as a link.
(Other definitions for vial that I've seen before include "Small container for liquids" , "Small medicine bottle" , "Small bottle used for medicines, laboratory work, etc" , "Small glass container" , "Not much bottle" .)