Crossword Genius

Swimmers ignoring the youngest’s higher priorities (5,4,2,3)

Ross

I believe the answer is:

other fish to fry

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'youngest's higher priorities' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'swimmers ignoring the' is the wordplay.
I cannot quite see how this works, but
'swimmers' could be 'fish' and 'fish' is located in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is located in the answer.
This may be the basis of clue (or it may be nonsense).

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I've seen this clue in The Sunday Times.
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