Answer: spiff
AnswerCrossword Clue
SPIFFNeaten (up)
spiffto make spiffy (usually fol. by up)
spiffto make stylish (fashionable)
spiffbonus or other form of remuneration given to retail salespeople for promoting the products of a particular manufacturer
spiffto reward (a salesperson) with a spiff
SPIFFSalesman's reward
SPIFFSalesman's reward, slangily
SPIFF... up (improve the look of)
SPIFFCalvin's alter ego Spaceman ...
SPIFFSpruce (up)
SPIFFNeaten, with "up"
SPIFFSplendid: Slang.
SPIFF.. up (neaten)
SPIFFAdorn, with "up"
SPIFF.. up (improve the look of)
SPIFFSmarten (up)
SPIFF.. up (make stylish)
SPIFFBest-dressedness