The most common and most likely answer to this crossword clue is the 7 letter word SPLURGE
I've seen this crossword clue in The Times
S
P
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U
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More clues leading to the result SPLURGE
- Poland in current upturn spend extravagantly
- Scottish footballers once with demand for unrestrained expenditure
- Start to spend pence and pounds on impulse?
- Records reflected desire to spend heavily
- Lash out, catching end of trowel in shrub
- Spend lots of money for plant around lake
- Sudden increase overwhelming place – leading to extravagance
- Extravagance: there’s sudden increase around place
- Overturned records encourage ostentatious display
- SNP extremists against Labour’s initial impulse to spend freely
Buddy explains!

The straight part
We know that "unrestrained expenditure" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case unrestrained expenditure = splurge.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 SPLURGE mean?
SPLURGE noun- An extravagant or ostentatious display.
- An extravagant indulgence; a spending spree.
- To (cause to) gush; to flow or move in a rush.
- To spend lavishly or extravagantly, especially money.
- To produce an extravagant or ostentatious display.