Answer: arch

AnswerCrossword Clue
ARCHCurved entranceway
ARCHPlayfully tricky
ARCH... of Titus (entryway to Palatine Hill)
ARCHAqueduct feature
ARCHKeystone setting
ARCHShoe insert
ARCHStructure with a keystone
ARCHSymbol of St. Louis
ARCHDecorative doorway
ARCHCheeky
ARCHImpish
ARCHSt. Louis attraction
ARCHFlatfoot's lack
ARCHClassy entrance
ARCHCurve in the foot
ARCHPrincipal
ARCHCurved construction
ARCHPart of a foot
ARCHRival leader?
ARCHViaduct feature
archcunning; crafty; sly.
ARCHCrafty
ARCHPodiatrist's concern
ARCHSt. Louis sight
ARCHEyebrow shape
ARCHFoot part
ARCHSt. Louis gateway
ARCHSt. Louis landmark
ARCHGateway structure
ARCHFoot feature
ARCHClever in a bent way?
ARCHEero Saarinen's Gateway ..
ARCHEyebrow, often
ARCHSole feature
ARCHWalk-through monument
ARCHKeystone site
ARCHMarvel of masonry
ARCHSole support
ARCHSole support?
ARCHGateway, for one