Related Clues:

• Cork, actually
• Lab output?
• [Don't make me bite you!]
• Sound of frustration
• Say ''Arf!''
• It may act as an intruder alert
• Initials may be carved into it
• Spaniel sound
• Give orders like a drill sergeant
• Say 'bow-wow'
• Dog sound
• "Better stay out of my yard!"
• Yap
• Doberman sound
• Canine complaint