Fashionable objective held in attempt (6)
I believe the answer is:
trendy
'fashionable' is the definition.
(similar in meaning)
'objective held in attempt' is the wordplay.
'objective' becomes 'end' (both can mean a purpose).
'held in' is an insertion indicator.
'attempt' becomes 'try' (synonyms).
'end' put inside 'try' is 'TRENDY'.
(Other definitions for trendy that I've seen before include "In vogue" , "Hot" , "Up to date, fashionable" , "In accordance with the latest fad" , "Fashionable, in style" .)