Alice's nonsense ballad (11)

I believe the answer is:

jabberwocky

(Other definitions for jabberwocky that I've seen before include "Lewis Carroll poem from "Through the Looking Glass"" , "Twas brillig poem" , "Nonsense poem in Lewis Carroll's Through the Looking Glass" , "Lewis Carroll nonsense poem" .)

I've seen this clue in the Sydney Morning Herald.

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