Crossword Genius

In crowd Scots frightened posh student (8)

Ross

I believe the answer is:

graduate

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'student' is the definition.
(I know that graduate is a type of student)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for graduate that I've seen before include "University alumnus" , "University type" , "Successfully complete a course in higher education" , "Person who has gained university degree" , "Move to the next stage" .)

I've seen this clue in The Independent.
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