Crossword Genius

One with a whistle ... who sometimes 1-Across? (3)

Ross

I believe the answer is:

ref

(Other definitions for ref that I've seen before include "'Game judge, in short (3)'" , "Football official (colloq.)" , "Sports official (abbrev.)" , "A diminutive umpire in soccer or boxing" , "Whistleblower (abbr)" .)

I've seen this clue in The New York Times.
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