Elaborate in style or plot (9)
I believe the answer is:
storyline
'plot' is the definition.
(I know that storyline is a type of plot)
'elaborate in style or' is the wordplay.
'elaborate' is an anagram indicator (I've seen this in other clues).
'in'+'style'+'or'='instyleor'
'instyleor' anagrammed gives 'STORYLINE'.
(Other definitions for storyline that I've seen before include "Plot of a novel, play or film" , "Novelly structure" .)