Go nicely and dance without me, my mischievous child (6,7)

I believe the answer is:

excuse oneself

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'go nicely and dance without' is the definition.
I know nothing about this answer so I can't tell whether this works.

'me my mischievous child' is the wordplay.
'me' becomes 'excuse' (I am not sure about this - if you are sure you should believe this answer much more).
'my' becomes 'one's' ('one's' is a humorous equivalent to 'my').
'mischievous child' becomes 'elf' (I've seen this in another clue).
'excuse'+'ones'+'elf'='EXCUSE ONESELF'

Can you help me to learn more?

(Another definition for excuse oneself that I've seen is " Ask permission and leave".)

I've seen this clue in The Times.

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