Horrible disobeying authority (9)
I believe the answer is:
revolting
'horrible' is the definition.
(thesaurus)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for revolting that I've seen before include "Repulsive" , "Rising in rebellion" , "Loathsome" , "rioting" , "Disgusting" .)