Recurrent idea from article supported by this writer (5)
I believe the answer is:
theme
'recurrent idea' is the definition.
(I've seen this before)
'article supported by this writer' is the wordplay.
'article' becomes 'the' (the definite article in English).
'supported by' is a charade indicator (letters next to each other) (in a down clue, some letters hold up others).
'this writer' becomes 'me' (the setter of the puzzle is the writer of the clue).
'the'+'me'='THEME'
'from' acts as a link.
(Other definitions for theme that I've seen before include "Leitmotiv" , "Unifying motif" , "Subject of a talk or piece of writing" , "Subject (of talk, text, etc)" , "(Writer's) topic" .)