Possible Clues:

• Treason — it is done (anag)
• The southern version is treasonable
• Revolting behaviour depicted in second issue
• Small issue causing insubordination
• Illicit undermining of the powers that be
• Conduct inciting rebellion
• Of this the southern version is a serious offence
• Criminal behaviour, issue confronted by school's principal
• Editions about actions that make people rebel against authority
• Did what was published in the South encourage public disorder?