Subject of an article by me (5)
I believe the answer is:
theme
'subject' is the definition.
(theme can mean a topic or subject)
'an article by me' is the wordplay.
'an article' becomes 'the' (the definite article).
'by' says to put letters next to each other.
'the'+'me'='THEME'
'of' is the link.
(Other definitions for theme that I've seen before include "tune used in Enigma Variations?" , "Musical idea; topic" , "matter for discussion" , "Subject matter, topic" , "Motif or melody" .)