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