Verse from Lear is twaddle (8)
I believe the answer is:
nonsense
'is twaddle' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for nonsense that I've seen before include "silly ideas" , "double Dutch?" , "Humbug!" , "hot air" , "Bunk" .)