Related Clues:

• Alphabetic symbol, of yore
• Bend shape
• Right- or lefthand turn
• Right-angled pipe
• Mysterious writing
• Eero's wing
• Bit of writing on the wall?
• Alphabetic character
• Architectural feature
• Corner letter?
• Wing, perhaps
• Extra room, perhaps
• Cockney's perdition
• Angled extension
• I, for one