Crossword Genius

A time for selecting the butt of jokes (3,5,2,5)

Ross

I believe the answer is:

the first of april

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'a time for selecting the butt of jokes' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'time for selecting the butt of jokes' is the wordplay.
I cannot quite see how this works, but
'time' could be 'april' (I've seen this before) and 'april' is found within the answer.
'for' could be 'to' (eg both can mean 'in the opinion of') and 'to' is present in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.
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