Related Clues:

• Date or age beginning
• Dude
• See 27-Down
• Daft
• See 34-Down
• The human race
• 'Oh, brother!'
• Lunatic
• 'That's really something!'
• Game piece
• Big boy?
• Exclamation of incredulity
• “Whew!”
• 'I can't believe it!'
• 'My goodness!'