Time to tear into fashion (5)
I believe the answer is:
trend
'fashion' is the definition.
(I've seen this in another clue)
'time to tear' is the wordplay.
'time' becomes 't' (abbreviation).
'to tear' becomes 'rend' (rending is a kind of tearing).
't'+'rend'='TREND'
'into' acts as a link.
(Other definitions for trend that I've seen before include "Become popular on social media" , "Drift; vogue" , "swing" , "Prevailing direction" , "Leaning; fashion" .)