Related Clues:

• Seneca's "reasoning animal"
• Crazy, metaphorically
• "Dude"
• Gibbon
• Crazy way to go?
• Copier at the zoo?
• How you go when you lose it?
• "Lemme go, ya big ___!"
• Person's close cousin?
• Roughneck
• Kong, e.g.
• Clumsy galoot
• "The Hairy ___" (Eugene O'Neill play)
• Rainforest inhabitant
• 'Sheesh!'