Related Clues:

• Oak finish?
• Husky sound
• Lab noise
• Kennel call
• Intruder's deterrent, maybe
• Weimaraner warning
• Hound sound
• It may come out of a toy
• Tree covering
• Trunk cover
• Strip bark
• Cousin of 'ruff!'
• Comic-strip yip
• Tree hugger?
• Response from Sandy