Not much like Nell? (6)
I believe the answer is:
little
'not much' is the definition.
(a small amount)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for little that I've seen before include "Small or minute" , "The Battle of ... Bighorn, Custer's last stand" , "Of no great size" , "Self-important authoritarian" , "` `...... pitchers have big ears' '" .)