Related Clues:

• St. Louis' Gateway ___
• Sweeping in scope
• Gateway, for one
• The full range
• Entrance to many a plaza
• From ___ (all-inclusive)
• Full-range
• Affectedly playful
• Char the curved structure
• Prefix meaning chief - maybe an angel
• A Curved shape that spans an opening
• Curved shape that spans on opening
• Curved shape that spans an opening
• Curved bony structure in the foot
• Curve spanning an opening