Related Clues:

• Mark it as potentially one point
• Besmirch volunteers caught in wickedness
• Colour, dye
• Dictator purging liberal in shame
• Dictator left abandoned in disgrace
• Mark is new saint
• Fabric discoloration
• Ink smudge on a shirt
• Mark, head of security, ain't stupid
• Way to introduce a fashionable spot
• Post-spill carpet spot
• Convert Ian to follow Saint Mark
• Spot not easily removed
• Rug discoloration
• A red wine one is hard to get out