Make more interesting by adding details (9)
I believe the answer is:
embellish
'make more interesting by adding details' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for embellish that I've seen before include "Enhance" , "Make more attractive by adding details" , "Make more attractive by adding ornament" , "Grace with" , "Adorn" .)