Not much like Nell? (6)
I believe the answer is:
little
'not much' is the definition.
('little' is the opposite to 'much')
I cannot understand how the rest of the clue works.
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' '" .)