Lover very keen on receiving revolutionary perfume (9)
I believe the answer is:
inamorato
'lover' is the definition.
(I know that inamorato is a type of lover)
'keen on receiving revolutionary perfume' is the wordplay.
'keen on' becomes 'into' (if you're 'into' something you're keen on it).
'receiving' is an insertion indicator.
'revolutionary' says the letters should be written in reverse (letters revolve around).
'perfume' becomes 'aroma' (synonyms).
'aroma' written backwards gives 'amora'.
'into' going around 'amora' is 'INAMORATO'.
'very' acts as a link.
(Other definitions for inamorato that I've seen before include "Italian lover" , "He loves" , "One who's fond of" , "Man loved" , "Male lover" .)