Quick; stylish (5)
I believe the answer is:
nifty
This clue is a double definition.
'quick' is the first definition.
(thesaurus)
'stylish' is the second definition.
(I've seen this in another clue)
(Other definitions for nifty that I've seen before include "Fast and neat" , "Really good (slang)" , "Particularly good (informal)" , "Stylish; agile (informal)" , "Stylish, nimble" .)