Its unlikely that a mischievous child can be dressed (10)

I believe the answer is:

improbable

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'unlikely that a mischievous child can be dressed' is the definition.
'improbable' can be an answer for 'unlikely' (I've seen this before). I'm unsure of the remainder of the definition.

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for improbable that I've seen before include "Highly unlikely" , "Far-fetched" , "Not likely" .)

I've seen this clue in The Irish News.

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