Good-natured question politician once asked himself (8)

I believe the answer is:

amicable

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'good-natured' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

(Other definitions for amicable that I've seen before include "Friendly, peaceable" , "cordial" , "Friendly and good-tempered" , "on good terms" , "Of friendly disposition, good-natured" .)

I've seen this clue in The Independent.

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