Possible Clues:

• A viewer's complaint
• Infection site
• Sat by set switching on and off makes viewer sore
• Reported dirty place that�s an eyesore?
• Inflamed swelling sun yet to set
• Affliction of 11-Across
• Painful swelling on eyelid
• Eye irritant
• Council finally abandons design, producing eyesore
• Tenor has to get rid of large swelling