The joker who helped you get the boot off? (3,6)

I believe the answer is:

leg puller

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'the joker' is the definition.
(I have seen 'Practical joker' mean 'leg-puller' so perhaps 'joker' could also mean 'leg-puller')

I can't explain the rest of the clue.

Can you help me to learn more?

(Another definition for leg puller that I've seen is " Prankster".)

I've seen this clue in the Evening Standard.

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