Shot, taking aim with it (6)
I believe the answer is:
trendy
'with it' is the definition.
(both can mean fashionable)
'shot taking aim' is the wordplay.
'shot' becomes 'try' (both can mean an attempt).
'taking' indicates putting letters inside.
'aim' becomes 'end' (both can mean a goal or purpose).
'try' going around 'end' is 'TRENDY'.
(Other definitions for trendy that I've seen before include "Chic (colloq.)" , "In vogue" , "following fashion" , "Stylish" , "all the rage" .)