Related Clues:

• Emergency directive?
• This is not difficult
• Make quiet or still - sounds like an order
• Render motionless from lack of wind
• Effortless, uncomplicated
• Make still - sounds like an order
• Posing no difficulty
• ... Rider (film)
• Make quiet or still - that's an order?
• Simple or uncomplicated
• Keep motionless by lack of wind
• Don't get the wind up, perhaps
• Don't get the wind up!
• Make it so that it won't come to blows
• Marry at a midshipman?