Nervous types could set something off (9)

I believe the answer is:

tremblers

I believe this clue is a double definition.

'nervous types' is the first definition.
(people who tremble)

'could set something off' is the second definition.
(type of fuse triggering a bomb)

(Another definition for tremblers that I've seen is " Quakers".)

I've seen this clue in The Guardian.

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