Beethoven's "Tempest" or "Pathétique," e.g (6)

I believe the answer is:

sonata

(Other definitions for sonata that I've seen before include "Solo instrumental composition" , "eg Moonlight, Kreutzer" , "To NASA, strangely, for the solo piece" , "Instrumental work" , "Beethoven's 'Moonlight', for example" .)

I've seen this clue in The Washington Post.

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