Crossword Genius

Expert (4,6)

Ross

'expert' is the definition.
(ace can informally mean very good)

This is the entire clue.

(Other definitions for ace that I've seen before include "Very good; playing card" , "reason for point of no return" , "One; A1" , "Top card or winning tennis serve" , "Crack" .)

I've seen this clue in the USA Today, The Times, The New York Times, The Sun, the Universal, The Wall Street Journal, The Mirror, the LA Times, The Star Tribune, the Penny Press, the Evening Standard, the King Feature Syndicate and The Telegraph.
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