Attempt to cover object with it (6)
I believe the answer is:
trendy
'with it' is the definition.
(both can mean fashionable)
'attempt to cover object' is the wordplay.
'attempt' becomes 'try' (synonyms).
'to cover' means one lot of letters goes inside another.
'object' becomes 'end' (I've seen this in other clues).
'try' enclosing 'end' is 'TRENDY'.
(Other definitions for trendy that I've seen before include "Modish" , "Up-to-date with the latest fad" , "Up to date, fashionable" , "Smart" , "following fashion" .)