Related Clues:

• Penthouse centerfold
• Boxer, for one
• Kitten or parakeet
• Borzoi, for one
• Kind of theory
• See 46-Down
• Treat like a dog?
• Newton's Diamond, for one
• Resident animal
• Stroke gently
• Friend of the man?
• Favorite, as a theory
• ?
• Follow relentlessly
• Goofy, e.g.