The most common and most likely answer to this crossword clue is the 9 letter word DETONATOR
I've seen this crossword clue in Financial Times
D
E
T
O
N
A
T
O
R
More clues leading to the result DETONATOR
- One creating explosion when roster observed to be the wrong way round
- Alliance replacing university in alternative course means to create boom?
- One could go off with detective working around schedule
- Upcoming duty list observed, one sets off
- Small charge for back duty list recorded
- Primer father keeps in school to read initially
- Turned up without performing piece of mine
- ‘Setter-off’ finally reached school by a hill
- Switch rotated on explosive device
- One sets off to trade on explosive
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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 DETONATOR mean?
DETONATOR noun- A device used to detonate an explosive device etc.
- A small explosive device attached to the railhead to provide an audible warning when a train passes over it.
- Any explosive whose action is practically instantaneous.
- A gun fired by a percussion cap.