More spiffy (7)
I believe the answer is:
nattier
'more spiffy' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for nattier that I've seen before include "Like the smarter set" , "Smarter and more fashionable" , "less scruffy" , "Louis XV court painter; more dapper" , "More clever" .)