Chairman’s upset, advocating disorder (9)
I believe the answer is:
anarchism
'disorder' is the definition.
(thesaurus)
'chairman's upset advocating' is the wordplay.
'chairman's' anagrams to 'ANARCHISM'.
However, I am not sure how the anagram is indicated.
Can you help me to learn more?
(Other definitions for anarchism that I've seen before include "Man's chair (anag.)" , "Bakunin advocated it" , "anti-government doctrine" , "lawless attitude" , "Anti-government ideology" .)