Crossword Genius

Excellent winner at Wimbledon (3)

Ross

I believe the answer is:

ace

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

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

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

Can you help me to learn more?

(Other definitions for ace that I've seen before include "hotshot" , "fighter pilot" , "rare driving result?" , "Entertain" , "In golf, a hole in one" .)

I've seen this clue in The Sun.
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