Related Clues:

• Like many a 21-Down
• Up on things, daddy-o
• Cool, as a daddy-o
• Like Austin Powers
• Cool, like a cat
• Miniskirt style
• Hardly squaresville
• 'The -- Squad'
• All the rage, once
• "The ___ Squad" of '60s-'70s TV
• In the know, in old slang
• Lead-in for cat
• TV's "The ___ Squad"
• Hip 1960s teen
• 1960s style