Related Clues:

• Tail end?
• Tetris shape
• Cloth measure
• Bent piece
• Measure of length
• Pipe fitter's union?
• Architectural annex
• Architectural wing, perhaps
• Connecting pipe
• Write a codicil
• Letter after kay
• Pipe fitter's joint
• Right-angled wing
• Wing that can't flap
• A kind of add on