The most common and most likely answer to this crossword clue is the 9 letter word OUTGOINGS
I've seen this crossword clue in The Daily Telegraph
O
U
T
G
O
I
N
G
S
More clues leading to the result OUTGOINGS
Buddy explains!

The straight part
We know that "expenditure" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case expenditure = outgoings.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 OUTGOINGS mean?
OUTGOINGS noun- The act of leaving or going out; exit, departure.
- (chiefly in the plural) Money that leaves one's possession; expenditure, outlay, expense.
- The extreme limit; the place of ending.