Pyotr Ilyich —, composer of 1890 opera The Queen of Spades (11)

I believe the answer is:

tchaikovsky

(Other definitions for tchaikovsky that I've seen before include "Pyotr -, Russian composer" , "Sleeping Beauty ballet composer" , "'Swan Lake' composer" , "Peter ---, Russian composer" , "1812 Overture Russian composer (V not W)" .)

I've seen this clue in The Mirror.

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