Many junior swimmers get a move on when it comes to food (3)

I believe the answer is:

fry

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'many junior' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

I can't explain the rest of the clue.

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(Other definitions for fry that I've seen before include "Small fish for the pan" , "Cook in fat; young fish" , "Cook in hot fat" , "Newly-hatched fishes for the pan?" , "Newly hatched fishes" .)

I've seen this clue in the Evening Standard.

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