Answer: niftier

AnswerCrossword Clue
NIFTIERMore stylish: Slang.
NIFTIERSmarter: Slang.
NIFTIERBetter: Slang.
NIFTIERFiner
NIFTIERCooler
NIFTIERComparatively neat
niftiersmart; fine
niftiervery good very attractive fine nifty clothes
niftierNIFTY, stylish (fashionable)