Crossword Genius

Edward Lear wrote this twaddle (8)

Ross

I believe the answer is:

nonsense

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'this twaddle' is the definition.
(I've seen this in another clue)

I don't understand the rest of the clue.

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(Other definitions for nonsense that I've seen before include "Language without meaning" , "Claptrap, hogwash" , "one [TOMMYROT], thirteen [CODSWALLOP], or twenty [BALDERDASH]" , "Codswallop, hooey" , "rhubarb" .)

I've seen this clue in The Sun.
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