Possible Clues:

• A drop of ink?
• Dirt blemish
• Losing to drunk is a disgrace
• Spot line included in autonomous program
• Stain on one's reputation
• Mark in second-class band
• Stain that is generally left by p?t? removed from table-top
• Flaw on a record
• Scribe's mishap
• Delete, with 'out'