The most common and most likely answer to this crossword clue is the 10 letter word MUNIFICENT
I've seen this crossword clue in The Guardian
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More clues leading to the result MUNIFICENT
Buddy explains!

The straight part
We know that "dispensing lots of money" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case dispensing lots of money = munificent.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 MUNIFICENT mean?
MUNIFICENT adjective- (of a person or group) Very liberal in giving or bestowing.
- (of a gift, donation, etc.) Very generous; lavish.