"Schitt's Creek" co-star and co-creator Levy (6)

I believe the answer is:

eugene

(Other definitions for eugene that I've seen before include "Great American playwright . . . . . . O'Neill" , "opera, but only first half" , "- Onegin, Tchaikovsky opera" , "fellow" , "Great Irish-American playwright . . . . . . O'Neill" .)

I've seen this clue in The Washington Post.

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