Answer: brightasabutton

AnswerCrossword Clue
BRIGHTASABUTTONSMART
BRIGHTASABUTTONQuick-witted
BRIGHTASABUTTONClever; alert
BRIGHTASABUTTONBrainy
BRIGHTASABUTTONClever and alert
BRIGHTASABUTTONClever