Related Clues:

• "Ten-hut!" undoer
• "Ten-hut!" reversal
• Drill instructor's order
• "Relax, and that's an order!"
• ___ as a bug in a rug
• Like a warm bed on a winter night
• A little tight
• Anxiety-free
• "Relax"
• A size too small, maybe
• Warm 'n' cozy
• Comfortably familiar
• Command from the brass
• Free from worries
• Army order to relax