Rich, luxurious (7)
I believe the answer is:
opulent
I believe this is a double definition.
'rich' is the first definition.
(similar in meaning)
'luxurious' is the second definition.
(I know that luxurious can be written as opulent)
(Other definitions for opulent that I've seen before include "extremely elegant" , "No let-up (anag)" , "Wealthy, luxurious" , "'Rich, sumptuous (7)'" , "'Deluxe, luxurious (7)'" .)