Rip in tiny skirt is very fashionable (6)
I believe the answer is:
trendy
'very fashionable' is the definition.
(I've seen this before)
'rip in tiny skirt' is the wordplay.
'rip' becomes 'rend' (synonyms).
'in' means one lot of letters goes inside another.
'skirt' means to remove the middle letters (skirt can mean the edge or outside of something).
'tiny' with its middle removed is 'ty'.
'rend' inserted into 'ty' is 'TRENDY'.
'is' is the link.
(Other definitions for trendy that I've seen before include "'Hip, fashionable (6)'" , "Stylish" , "With-it" , "Informally fashionable" , "all the rage" .)