Related Clues:

• Tree part
• Fir coat
• First alert, often
• Woof
• Cottonwood covering
• Great work
• Bow-wow
• Sound from the kennel
• Canine sound
• Seal sound
• Fido's utterance
• 'Arf' sound
• Canine comment
• Oak finish?
• Intruder's deterrent, maybe