Luxury, sumptuousness (8)
I believe the answer is:
opulence
I believe this clue is a double definition.
'luxury' is the first definition.
(I know that luxury can be written as opulence)
'sumptuousness' is the second definition.
(I know that sumptuousness can be written as opulence)
(Other definitions for opulence that I've seen before include "Conspicuous wealth" , "State of affluence and luxury" , "Luxury, sumptuousness" , "Luxuriousness" , "Ostentatious wealth" .)