Crossword Genius

Cause of a game's end (4)

Ross

I believe the answer is:

tilt

(Other definitions for tilt that I've seen before include "Thrust with lance, like Don Quixote at windmills" , "Slant - joust" , "Lean to one side" , "Lean, slope" , "Stab" .)

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