Possible Clues:

• Computing pro volunteers to cut off alcohol in revenge
• In annoyance, return bird, plump, having nothing right to eat
• Balanced reaction involving change of heart
• Defiant way to respond to insults
• Retaliation? Be it on Cockney's head!
• Mechanical trade
• Act of retaliation
• Counterattack from army in stronghold, one trapped in middle of battle at first
• Payback time -- gift of poor Stuart's oddly mislaid
• In equal measure