One of the young high-fliers (6)

I believe the answer is:

eaglet

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'one of the young' is the definition.
'eaglet' can be an answer for 'young' (eaglet is a kind of young). I am not sure about the 'one of the' bit.

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for eaglet that I've seen before include "another of the golden generation?" , "Young keen-sighted bird" , "A young bird of prey, lives in eyrie" , "Young lawyer" , "Raptor chick" .)

I've seen this clue in the Evening Standard.

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