Improved, augmented (8)
I believe the answer is:
enhanced
This clue is a double definition.
'improved' is the first definition.
(enhancing is a kind of improving)
'augmented' is the second definition.
(I've seen this in another clue)
(Other definitions for enhanced that I've seen before include "Increased the attractiveness of, improved" , "Sexed-up" , "Increased in value or quality" , "Improved or increased the value" , "Increased number" .)