Related Clues:

• Cowardly one of film
• MGM mascot
• Unoriginal one
• Role for 37-Down
• Go ___ (freak out)
• Koko or Washoe, e.g.
• Big lug
• King Kong, notably
• Animal with a cub
• Gibbon, e.g.
• Serengeti roamer
• King of beasts
• Serengeti resident
• 'The Naked ___' (1960's best seller)
• Gibbon, for instance