Related Clues:

• Chilling out
• It may precede a storm
• Halcyon
• Pre-storm status
• Like the proverbial cucumber
• Not tense
• Storm preceder, it's said
• Socially adept, in slang
• 'Groovy'
• Not at all stiff
• ''Ten-hut!'' reversal
• Drill sergeant's command
• "Relax, soldier!"
• Like laid-back jazz
• Not exactly friendly