Evil one starting to become real crazily intolerant (9)
I believe the answer is:
illiberal
'intolerant' is the definition.
(synonyms)
'evil one starting to become real crazily' is the wordplay.
'evil' becomes 'ill' (I've seen this in other clues).
'one' becomes 'i' (Roman numeral).
'starting to' indicates taking the first letters.
'crazily' is an anagram indicator.
The initial letter of 'become' is 'b'.
'real' anagrammed gives 'eral'.
'ill'+'i'+'b'+'eral'='ILLIBERAL'
(Other definitions for illiberal that I've seen before include "Intolerant; reactionary" , "Reactionary - mean" , "Intolerant; ungenerous" , "Restrictive" , "unenlightened?" .)