Related Clues:
- Triangular feature in gym -- mend it when broken
- Building build-on
- Letterhead?
- 90-degree joint
- First in line?
- Many a large desk or sofa
- Square-corner shape
- Building addition of 90 degrees
- Wall panel
- Right-angled shape
- 90-degree pipe
- Half-rectangle
- Pipe joint with a right angle
- Dogleg shape, roughly
- Follower of kay