Idle talk about Lewis Carroll character (7)
I believe the answer is:
chatter
'idle talk' is the definition.
(thesaurus)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for chatter that I've seen before include "Informal talk" , "Rabbit on" , "Talk informally" , "Talk noisily" , "Babble or gossip" .)