The most common and most likely answer to this crossword clue is the 4 plus 3 letter word BLOW OUT
I've seen this crossword clue in Financial Times
B
L
O
W
O
U
T
More clues leading to the result BLOW OUT
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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 BLOW OUT mean?
BLOW OUT noun- A sudden puncturing of a pneumatic tyre/tire.
- A sudden release of oil and gas from a well.
- A social function, especially one with large quantities of food.
- A large or extravagant meal.
- A sporting contest that is decidedly one-sided and whose outcome is no longer in doubt.
- An argument; an altercation.
- A sandy depression in a sand dune ecosystem caused by the removal of sediments by wind.
- An extreme and unexpected increase in costs, such as in government estimates for a project.
- The cleaning of the flues of a boiler from scale, etc., by a blast of steam.
- An unsightly flap of skin caused by an ear piercing that is too large.