Lewis Carroll poem (11)
I believe the answer is:
jabberwocky
'lewis carroll poem' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for jabberwocky that I've seen before include "Lewis Carroll nonsense poem" , "Nonsense poem in Lewis Carroll's Through the Looking Glass" , "Lewis Carroll poem from "Through the Looking Glass"" , "Twas brillig poem" .)