Such a pupil is likely to shine (6)

I believe the answer is:

bright

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'such' is the definition.
Both the answer and definition are adjectives. Perhaps you can see an association between them that I can't see?

I don't understand the remainder of the clue.

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(Other definitions for bright that I've seen before include "Lustrous, shining" , "Effulgent" , "Dazzling or intelligent" , "Clever; vivid" , "supporter of free trade" .)

I've seen this clue in The Globe and Mail.

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