Report of perfume demonstration at focal location (9)
I believe the answer is:
centrally
'at focal location' is the definition.
'report of perfume demonstration' is the wordplay.
'report of' indicates a 'sounds like' (homophone) clue.
'perfume' becomes 'scent' ('scent' can be a synonym of 'perfume').
'demonstration' becomes 'rally'.
'scent' sounds like 'cent'.
'cent'+'rally'='CENTRALLY'
(Other definitions for centrally that I've seen before include "in the middle" , "Chiefly" .)