Crossword Clue:

Smarten up

AnswerCrossword Clue
GETWISESmarten up
PRIMPSmarten up
SPIFFSmarten (up)
PERKSmarten (up).
PREENSmarten up
SPRUCESmarten (up)
PERKSmarten, with "up"
PERKSmarten one's appearance (with "up").