Mischievousness you wouldn’t expect from the little angel? (9)

I believe the answer is:

devilment

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'mischievousness' is the definition.
('devilment' can be a synonym of 'mischievousness')

I cannot understand how the remainder of the clue works.

(Other definitions for devilment that I've seen before include "Reckless mischief" , "Frolicsome mischief" .)

I've seen this clue in the Evening Standard.

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