Improve, embellish (6)
I believe the answer is:
enrich
I believe this clue is a double definition.
'improve' is the first definition.
(I know that enrich is a more specific form of improve)
'embellish' is the second definition.
(I've seen this in another clue)
(Other definitions for enrich that I've seen before include "Give money" , "Add to and improve" , "Heighten" , "increase wealth" , "Add nutrients to" .)