Possible Clues:

• Don't go away, Sister, by the sound of it; there's no bloody flow (6)
• No progressive state succeeded with secret police
• Spying's beginning thanks to MIsix inactivity
• Stagnation, or stoppage of circulation
• Arrest by secret policemen
• Wise to include wrecked boat in malicious damage
• Stagnation
• Stoppage to assist reform
• As is, the street is stagnating
• Sounds like the way to tell your little sister not to go and get stagnant like this