Related Clues:
- Optical instrument with a powerful magnifying lens
- It keeps grass dry in a stadium
- Downward-facing concave shape
- One taking the long view?
- Stadium feature, maybe
- Circular roof
- There's a famous 'half' one in Yosemite National Park
- Top of the Capitol Building
- Planetarium feature
- After torrential sleet cloak glass
- High point of St Peter's Basilica
- Rounded part of a building
- Tokyo ___ (stadium that hosts the Yomiuri Giants)
- Stadium's rain blocker
- Select broken and occasionally complex instrument