Answer:

ARCH

Answer	Crossword Clue
ARCH	Eero Saarinen's Gateway ..
ARCH	Podiatrist's concern
ARCH	St. Louis sight

ARCH	Eyebrow shape
ARCH	Foot part
ARCH	St. Louis gateway
ARCH	St. Louis landmark
ARCH	Gateway structure
ARCH	Foot feature
ARCH	Clever in a bent way?
ARCH	Crafty

ARCH	Eyebrow, often
ARCH	Sole feature
ARCH	Walk-through monument
ARCH	Keystone site
ARCH	Marvel of masonry
ARCH	Sole support
ARCH	Sole support?
ARCH	Gateway, for one

ARCH	Pedal feature
ARCH	St. Louis attraction
ARCH	Playfully tricky
ARCH	... of Titus (entryway to Palatine Hill)
ARCH	Aqueduct feature
ARCH	Keystone setting
ARCH	Shoe insert
ARCH	Structure with a keystone

ARCH	Symbol of St. Louis
ARCH	Decorative doorway
ARCH	Cheeky
ARCH	Impish
ARCH	Curved entranceway
ARCH	Flatfoot's lack
ARCH	Classy entrance
ARCH	Curve in the foot

ARCH	Principal
ARCH	Curved construction
ARCH	Part of a foot
ARCH	Rival leader?
ARCH	Viaduct feature