Episode on artist's compelling work (4-6)
I believe the answer is:
page-turner
'compelling work' is the definition.
(I've seen this before)
'episode on artist's' is the wordplay.
'episode' becomes 'page' (one part or instalment).
'on' says to put letters next to each other (in a down clue, letters appear on others).
'artist' becomes 'turner' (painter JMW Turner).
'page'+'turner'='PAGE-TURNER'
(Other definitions for page-turner that I've seen before include "exciting book" , "Book one can't put down" , "'Unputdownable' book" , "Gripping book" .)