Crossword Genius

You finally leave sudoku undone and gain prestige (5)

Ross

I believe the answer is:

kudos

I'm a little stuck... Click here to teach me more about this clue!

'prestige' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for kudos that I've seen before include "Pats on the back" , "Informal honour of glory" , "Renown" , "Laudation" , "Fame - prestige" .)

I've seen this clue in the Sydney Morning Herald.
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