Perfume despatched, did you say? (5)
I believe the answer is:
scent
'perfume' is the definition.
(I know that perfume can be written as scent)
'despatched did you say?' is the wordplay.
'despatched' becomes 'sent' (to despatch is to send off).
'did you say?' shows a homophone (sound like).
'sent' sounds like 'SCENT'.
(Other definitions for scent that I've seen before include "Fragrance" , "Distinctive aroma" , "Distinctive odour" , "Get wind of" , "Pleasant smell" .)