Disobey or can't even change (10)
I believe the answer is:
contravene
'disobey' is the definition.
(thesaurus)
'or can't even change' is the wordplay.
'change' indicates an anagram.
'or'+'cant'+'even'='orcanteven'
'orcanteven' with letters rearranged gives 'CONTRAVENE'.
(Other definitions for contravene that I've seen before include "Go against (a rule)" , "Conflict with" , "Break" , "Offend against (law)" , "Go against (rules)" .)