Fashionably dated (5)
I believe the answer is:
retro
'fashionably dated' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for retro that I've seen before include "Imitative of past styles" , "Looking backwards" , "consciously old-fashioned" , "Reliving the past" , "reminding us of the past" .)