Related Clues:

• Order not to flap but to assuage
• Still do not panic
• Medal sunny state's secured still
• Still good advice to the overexcited
• Not flip
• 'Do not panic!'
• Immobilize at sea, in a way
• Don't get the wind up
• Crisis advice
• 'Don't panic'
• "Don't panic!" (2 words)
• "Chill out!" (2 words)
• Leave a sailing vessel unable to move for lack of wind
• Render motionless — don't panic!
• Leave still (of a ship)