Subject of a centuries-old theatrical superstition (7)

I believe the answer is:

macbeth

(Other definitions for macbeth that I've seen before include "play with tragic results" , "Scottish ruler" , "Shakespeare's Scottish play, considered unlucky" , "Ill-fated Shakespearean king" , "King of Scotland, 1040-1057" .)

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

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