The most common and most likely answer to this crossword clue is the 9 letter word OVERSPEND
I've seen this crossword clue in The Times
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More clues leading to the result OVERSPEND
- Squander cash on account of what bookie offers? Then stop!
- Budget problem proves Ned wrong
- To exceed one’s budget unfortunately proves point
- Finished dispatch admitting pressure and excessive outlay
- Series of balls are due to exceed budget
- Run out of cash? Deliveries are kept on hold
- Excessive outlay proves awkward to terminate
- To exceed one's budget unfortunately proves point
- Deliveries threaten to exceed budget
Buddy explains!

The straight part
We know that "Budget problem" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case budget problem = overspend.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 OVERSPEND mean?
OVERSPEND noun- The amount by which someone or something is overspent
- To spend too much money; especially, to spend more than one earns.