Related Clues:

• Slander at first, most unfair detraction
• Piglets play in it
• It's slung during campaign season
• Managing Director crosses union leader, getting bad name
• Makeup of juvenile pies, perhaps
• Greek character died in wet earth
• Filth from curmudgeon
• Nasty campaign accusations
• ___ pie (kid's "dessert")
• Greek character died in sludge
• It's slung during some campaigns
• Wet soft earth
• It makes a dirty pie
• Marsh stuff
• Ingredients for a backyard pie