Related Clues:

• Send
• Incite
• So
• Attack dog command
• Fix
• Command to Fido
• Error indicator
• Order to attack, with 'on'
• Set a setter (on)
• Canine command
• Urge to attack, with 'on'
• '___ 'em, Rover!'
• [their mistake, not mine]
• Like 'it'
• Quotation notation