Crossword Genius

It enables the learner to shine (10)

Ross

I believe the answer is:

brightness

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'to shine' is the definition.
(thesaurus)

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

Can you help me to learn more?

(Other definitions for brightness that I've seen before include "Luminosity" , "Intelligence" .)

I've seen this clue in The Irish News.
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