Answer:

smart

AnswerCrossword Clue
SMARTIntelligent
SMARTSharp
SMARTSting
SMARTTony
SMARTStylish
SMARTHurt sharply
SMARTChic
SMARTBrainy
SMARTLike grade skippers
SMARTUpper-class?
SMARTMensa-eligible
SMARTWhiplike?
SMARTNatty
SMARTLike a 52-Across
SMARTFeel the pain
SMARTLike a brainiac
SMARTNattily dressed
SMARTClever
SMARTSophisticated
SMARTLike some cards
SMARTMensa-suitable
SMARTOn the ball
SMARTSassy
SMARTLike some bombs
SMARTBurn
SMARTHurt a little
SMARTEligible for Mensa
SMARTHurt
SMARTLike some moves
SMARTKind of cookie
SMARTLike a whip?
SMARTBright
SMARTLike modern bombs
SMARTBe the victim of a sting?