Related Clues:

• Make relaxed
• 'Keep your cool'
• 'Chill...'
• ''Chill out!''
• "Calm down!"
• ''Chill!''
• "Don't panic!"
• "Relax"
• Make quiet or still - sounds like an order
• Render motionless from lack of wind
• Make still - sounds like an order
• Make quiet or still - that's an order?
• Keep motionless by lack of wind
• Don't get the wind up, perhaps
• Don't get the wind up!