Antiquated, passé (5)
I believe the answer is:
dated
I believe this clue is a double definition.
'antiquated' is the first definition.
(I've seen this before)
'passe' is the second definition.
(I've seen this before)
(Other definitions for dated that I've seen before include "Went out with - old hat" , "Out of fashion" , "Met socially by arrangement" , "No longer fashionable or current" , "Revealed the age of" .)