Rich — sumptuous (7)
I believe the answer is:
opulent
This clue is a double definition.
'rich' is the first definition.
(similar in meaning)
'sumptuous' is the second definition.
(I know that sumptuous can be written as opulent)
(Other definitions for opulent that I've seen before include "'Rich, sumptuous (7)'" , "Rolling" , "Ostentatiously costly and luxurious" , "'Deluxe, luxurious (7)'" , "magnificent" .)