Crossword Genius

Having done really well, was radiant (5)

Ross

I believe the answer is:

shone

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'was radiant' is the definition.
(I've seen this in another clue)

I cannot understand how the rest of the clue works.

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(Other definitions for shone that I've seen before include "Excelled; glowed" , "did brilliantly" , "Gleamed" , "Radiated, emitted light" , "Gave off light" .)

I've seen this clue in the Evening Standard.
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