Related Clues:

• Like icecaps
• Hard to fluster
• Diametric
• Calm and relaxed
• ''The ___ Express''
• Beatnik's 'all right'
• Word with cap or bear
• Beatnik's expletive
• 56, say
• From the Arctic
• Type of bear or cap
• Not nervous
• In need of salt?
• Hardly gregarious
• Ice-cold