Smart attempt to get a goal in (6)
I believe the answer is:
trendy
'in' is the definition.
(thesaurus)
'smart attempt to get a goal' is the wordplay.
'smart attempt' becomes 'try' (I've seen this before. I am not sure about the 'smart' bit.**).
'to get' is an insertion indicator.
'a goal' becomes 'end' ('end' can be a synonym of 'goal').
'try' placed around 'end' is 'TRENDY'.
Can you help me to learn more?
(Other definitions for trendy that I've seen before include "following fashion" , "With it, a la mode" , "Up to date, fashionable" , "In vogue" , "In accordance with the latest fad" .)