Related Clues:

• Smear
• Like Edmund in 'King Lear'
• Attack ad, maybe
• Slide specimen
• Knight's need
• Besmirch
• Dark
• More than bad
• No good deed
• Full of turpitude
• Scolding, e.g.
• Slight on the stump, say
• Bad treatment
• 'Who knows what ___ lurks ...'
• Drag through the mud