Improbable — I completely refuse! (3,6)

I believe the answer is:

not likely

I believe this clue is a double definition.

'improbable' is the first definition.
(unlikely)

'i completely refuse' is the second definition.
(phrase used to refuse or reject a request)

(Another definition for not likely that I've seen is " Toni Kelly confused? Hardly".)

I've seen this clue in The Times.

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