What father may do at uncle’s? (3)

I believe the answer is:

pop

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'do at uncle's?' is the definition.
The answer and definition can be both related to natural events as well as being singular nouns.
Perhaps you can see a link between them that I can't see?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for pop that I've seen before include "Youthful music, dad(3)" , "Thus goes the weasel in children's rhyme" , "Cartoon sailor (showing amazement?)" , "Sound of a balloon bursting" , "Explode; drink" .)

I've seen this clue in the Evening Standard.

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