12 across
Threatening
little
devil
with
termination
(9)
Threatening little devil with termination (9)
hints
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checks
0
hints
The definition is at the beginning of the clue.
How the clue works
Right, so Threatening is your definition there, meaning something imminent or looming. For the wordplay, take IMP (that's your little devil) and stick ENDING (a termination) on the back of it, and you get the answer.