The most common and most likely answer to this crossword clue is the 9 letter word BANKROLLS
I've seen this crossword clue in The Guardian
B
A
N
K
R
O
L
L
S
More clues leading to the result BANKROLLS
Buddy explains!

The straight part
We know that "Finances" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case finances = bankrolls.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 BANKROLLS mean?
BANKROLLS noun- A roll of banknotes or other paper currency, carried in lieu of a wallet.
- The monetary assets of a person or organization.
- To fund a project; to underwrite something.