Article with yours truly as subject (5)
I believe the answer is:
theme
'subject' is the definition.
(theme can mean a topic or subject)
'article with yours truly' is the wordplay.
'article' becomes 'the' (the definite article in English).
'with' is a charade indicator (letters next to each other).
'yours truly' becomes 'me' (the person who set this crossword).
'the'+'me'='THEME'
'as' is the link.
(Other definitions for theme that I've seen before include "Motif or melody" , "idea of the work" , "Leitmotiv" , "sort of tune" , "thing under discussion" .)