Mark has the article I'm after (3)
I believe the answer is:
aim
'mark' is the definition.
(thesaurus)
'the article i'm after' is the wordplay.
'the article' becomes 'a' (the indefinite article in English).
'i'm' becomes 'im' ().
'after' is a charade indicator (letters next to each other).
'a'+'im'='AIM'
'has' acts as a link.
(Other definitions for aim that I've seen before include "Train" , "Try to achieve" , "Object; intend" , "Purpose, intention" , "Point or direct, a weapon say" .)