Close in an attempt to be fashionable (6)
I believe the answer is:
trendy
'be fashionable' is the definition.
(similar in meaning)
'close in an attempt' is the wordplay.
'close' becomes 'end' (close can mean to end or finish).
'in' means one lot of letters goes inside another.
'an attempt' becomes 'try' (synonyms).
'end' going within 'try' is 'TRENDY'.
'to' is the link.
(Other definitions for trendy that I've seen before include "Cool" , "Informally fashionable" , "Informally in the latest fashion" , "With-it" , "Voguish" .)