Related Clues:

• They communicate using Yerkish
• Bonobo, for one
• Rue Morgue perpetrator
• Toledo Zoo primate
• Tarzan raiser
• Our cousins
• Tarzan's cronies
• Practice "monkey see, monkey do"
• Class clown, often
• Big louts
• Big goons
• Dian Fossey study
• Grape ___ (Hanna-Barbera beast)
• 'Great' creature
• Breast-beating vegetarian