The most common and most likely answer to this crossword clue is the 5 letter word RUBLE
I've seen this crossword clue in The Times
R
U
B
L
E
More clues leading to the result RUBLE
- Cossack's ready to regret pinning leaders of Light Brigade back
- Judge sequesters billions in money
- . Legislation limiting Belgium’s currency
- Foreign currency problem underpinned by the French
- Government holds British currency
- 21 breaking the law in foreign capital
- Regret taking lawyer's money
- Russian currency law broken by British
Buddy explains!

The straight part
We know that "money" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case money = ruble.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 RUBLE mean?
RUBLE noun- The monetary unit of Russia, Belarus and Transnistria equal to 100 kopeks (Russian: копе́йка, Belarusian: капе́йка). The Russian ruble's symbol is ₽.