Related Clues:

• 'Far out, man!'
• Employer
• Cool, in the '60s
• ''Peachy keen!''
• Swell, to surfers
• Word in a cadence
• Radioactivity unit
• "So cool!"
• Like a jazz cat
• Springsteen sobriquet
• 'Who's the ___?'
• "Way cool!"
• ''Cool!''
• ''Super!''
• Super cool