Related Clues:
- Curved part of stone bridge, perhaps
- Construction with a keystone
- Eyebrow, e.g
- Move up, as an eyebrow
- St. Louis' Gateway, e.g
- Curve of the foot
- Champs-Élysées landmark
- Structure with a keystone
- Lead-in for "enemy"
- Bow before bishop
- Elaborate entrance
- Go up, as eyebrows
- McDonald's golden symbol
- Super-10
- A good 72-Across supports it