Subject of article by yours truly (5)
I believe the answer is:
theme
'subject' is the definition.
(theme can mean a topic or subject)
'article by yours truly' is the wordplay.
'article' becomes 'the' (the definite article).
'by' says to put letters next to each other.
'yours truly' becomes 'me' (the person who set this crossword).
'the'+'me'='THEME'
'of' is the link.
(Other definitions for theme that I've seen before include "idea of the work" , "Signature tune" , "Unifying motif" , "He met (anag) - subject" , "A subject or repeated melody" .)