Related Clues:

• Terrier or retriever
• Harass, in a way
• See 68-Across
• One may sit for a master
• Brittany, for one
• It's found in a pound
• Boxer, for one
• Borzoi, for one
• See 46-Down
• Newton's Diamond, for one
• Friend of the man?
• ?
• Follow relentlessly
• Goofy, e.g.
• Canine