Related Clues:

• Lump of gel
• Printout problem
• Cross out; inky mess
• Soak up (ink); blemish
• Mark with colour, dirt
• Ink stain; disgrace
• Penetrative dye
• Dark stain
• Dirty mark; dye
• Dry piece of writing gets bad mark
• Discoloured mark
• Indistinct object, black, covering sky
• Indeterminate mass
• Unsightly mark
• Dark mark/stain