Related Clues:

• Architectural feature
• Corner letter?
• Wing, perhaps
• Stock attachment
• Extra room, perhaps
• Thirst quencher
• Architectural add-ons
• Shelf brackets
• Cockney's perdition
• Angled extension
• Cannon attachment?
• Last piece of orange?
• Shape of a right angle
• Summertime cooler
• George who wrote 'Fables in Slang'