Related Clues:

• Kind of potato
• Hard to fluster
• Calm and relaxed
• Like some comic book heroes
• Beatnik's 'all right'
• Beatnik's expletive
• 56, say
• Smashing
• ''Awesome!''
• Not nervous
• "Cool!"
• Dulcet
• "Incredible!"
• ''Fabulous!''
• Like the proverbial cucumber