This youngster getting left could make awful noise (4)

I believe the answer is:

babe

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'this youngster' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

(Other definitions for babe that I've seen before include "Tiny infant or good-looking girl" , "Ruth was one" , "Pretty Woman" , "Ruth possibly" , "Hot girl" .)

I've seen this clue in The Guardian.

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