Elaboration makes a story more interesting (13)
I believe the answer is:
embellishment
'elaboration' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for embellishment that I've seen before include "Detail, often untrue, added to a story to make it more interesting" , "Adornment, decoration" , "decorative detail" , "Elaboration" , "Additional beautification" .)