Time tears apart fashions (6)
I believe the answer is:
trends
'fashions' is the definition.
(I've seen this before)
'time tears apart' is the wordplay.
'time' becomes 't'.
'tears apart' becomes 'rends' (I've seen this before).
't'+'rends'='TRENDS'
(Other definitions for trends that I've seen before include "Prevailing directions" , "Fashion directions or continuing tendencies" , "Current movements in styles, tastes etc." , "Prevailing styles, fashions" , "Fashions or tendencies" .)