Related Clues:

• Hatch plots
• Devious plan
• Pyramid, for instance
• Grand plan
• Conspiracy
• Sneaky plan
• Systematic plan
• Connivance
• Collaborate sneakily
• Devious plot
• Crook's plan, e.g.
• Crook's plan
• One may be cooked up
• Underhanded plan
• Secret plan