Rebel Democrat insisted on change? (9)
I believe the answer is:
dissident
'rebel' is the definition.
(thesaurus)
'democrat insisted on change?' is the wordplay.
'democrat' becomes 'd'.
'on' says to put letters next to each other.
'change?' indicates an anagram (I've seen 'change' mean this).
'd' put after 'insisted' is 'insistedd'.
'insistedd' is an anagram of 'DISSIDENT'.
(Other definitions for dissident that I've seen before include "One opposing official policy" , "Person opposing official policy" , "Protester" , "Political nonconformist" , "Rebel, protestor" .)