The most common and most likely answer to this crossword clue is the 8 letter word OPULENCE
I've seen this crossword clue in The Guardian
O
P
U
L
E
N
C
E
More clues leading to the result OPULENCE
- Plenty whine after going outside
- Plenty of blubber to cut at one time
- University left in old money for wealth
- Wealth from work uncle wasted at end of life
- Oscar regularly pulls in money for luxury
- Wealth but no money around mid-July
- Old coppers having seized most of haul retired in luxury
- Wealth of old coins impressing university lecturer initially
- Old money around centre of Hull creates wealth
- Formerly, sending in puzzle with unfilled centre could bring prosperity
Buddy explains!

The straight part
We know that "Wealth" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case wealth = opulence.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does OPULENCE mean?
OPULENCE noun- Wealth
- Abundance, bounty, profusion