The most common and most likely answer to this crossword clue is the 7 letter word GRENADE
I've seen this crossword clue in Financial Times
G
R
E
N
A
D
E
More clues leading to the result GRENADE
- Fantastic range of French missile
- Something syrupy to drop in explosive device
- Unexpected danger, eastern weapon
- Enraged drunk – one may explode
- There's European support for island nation short of a missile
- Weapon launched, grandee distraught
- Terrible danger holding end of wartime bomb
- What constitutes danger, when exploding close to one?
- Small device to blow up raised part of sedan ergonomically
- 15 about what might have gone off
Buddy explains!

The straight part
We know that "what might have gone off" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case what might have gone off = grenade.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 GRENADE mean?
GRENADE noun- A small explosive device, designed to be thrown by hand or launched from a grenade launcher.
- A pomegranate.
- A charge similar to a fireball, and made of a disc-shaped bomb shell, but with only one set of flames at the top.
- An unattractive girl.
- To use grenade(s) upon.