Crossword Genius

Unsettlingly startle a young actress (7)

Ross

I believe the answer is:

starlet

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'a young actress' is the definition.
('starlet' can be a synonym of 'young actress')

'unsettlingly startle' is the wordplay.
'startle' can be anagrammed to 'STARLET'.
But, I am not sure how this is indicated.

Can you help me to learn more?

(Other definitions for starlet that I've seen before include "young celebrity" , "Young film actress with a future?" , "Promising young film actress" .)

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