Possible Clues:

• Deliberately destroy for clog generation
• Deliberately destructive act
• Sailor involved with drunk and degenerate cripple
• Scupper flying boats with a case of gelignite
• What boots it to bring about destruction?
• Deliberately destroy footwear with little silver shoelace at the bottom
• A base got wrecked in deliberate act of destruction
• Deliberate subversion
• Spy's activity
• Clog mangle regularly to gum up the works?