Revolutionary tsar China crushed (9)
I believe the answer is:
anarchist
'revolutionary' is the definition.
(thesaurus)
'tsar china crushed' is the wordplay.
'crushed' is an anagram indicator.
'tsar'+'china'='tsarchina'
'tsarchina' anagrammed gives 'ANARCHIST'.
(Other definitions for anarchist that I've seen before include "revolting type?" , "bolshevik" , "One who would abolish all government" , "Who may have wanted to destroy" , "supporter of lawlessness" .)