Possible Clues:

• Devalue
• This person's two ducks causing damage
• Maybe demonic look causes damage?
• Current politician's broadcast causing damage
• Diminish value of child-bearing?
• Debilitate
• Damage results from one member being overbearing
• Damage caused by mutation originally, mate — one's on top of it
• Injure one married couple
• Partly skimp airing leading to damage