Extremist element, one without extreme characters (3-4)
I believe the answer is:
neo-nazi
'extremist element one without extreme characters' is the definition.
I know nothing about this answer so I cannot tell whether this works.
'extremist element one without extreme characters' is the wordplay.
'extremist element' becomes 'neon' (neon is a kind of element. I am not sure about the 'extremist' bit.).
'one' becomes 'i' (Roman numeral).
'without' indicates putting letters inside ('without' can be similar in meaning to 'outside').
'extreme characters' becomes 'AZ' (letters at the extremes of the alphabet).
'neon'+'i'='neoni'
'neoni' placed around 'az' is 'NEO-NAZI'.
Can you help me to learn more?
(Other definitions for neo-nazi that I've seen before include "Extreme nationalist" , "Modern disciple of Hitler" , "Modern Hitlerite" .)