Related Clues:

• Old-fashioned "Cool!"
• Fantastic, in Beatlemania
• The -- Four
• "The ___ Four" (The Beatles)
• 'Fab!'
• Wonderful, in slang
• '60s adjective
• Like a '60s foursome
• Marv
• The ___ Four
• "Marvy!"
• Cool (or furrowed?)
• Super, in the '60s
• Morvan of Milli Vanilli (i.e., the one who's still alive)
• 'Terrif'