Related Clues:

• Kind of instinct
• Take off on
• Play 'Simon says'
• Can finish
• Knuckle dragger
• Varmint
• Mighty Joe Young, e.g.
• Animal
• Show unoriginality
• Sloth, e.g.
• King Kong, for one
• Forest swinger
• Boorish sort
• Zoo attraction
• Yerkes Center inhabitant