Related Clues:

• Close male rel
• Dude relative?
• Sis' male sibling
• Uses a keyhole, perhaps
• One of a pair of fraternal twins, maybe
• Chum, nowadays
• Modern-day mac
• 18-Down, for one
• Malia, to Sasha
• Close relation, informally
• 'My man'
• Relative to Spanish river losing energy
• Mom, to Auntie
• Manssiere, to Kramer
• ''Dude!''