Crossword Genius

One fighter pilot (3)

Ross

I believe the answer is:

ace

This clue is a double definition.

'one' is the first definition.
(ace has a value of one in some card games)

'fighter pilot' is the second definition.
(an ace pilot)

(Other definitions for ace that I've seen before include "Unbeatable service" , "Top card or champion" , "first-class" , "'wicked'!" , "Brill" .)

I've seen this clue in The Sun.
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