Improved, augmented (8)
I believe the answer is:
enhanced
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">improved</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(enhancing is a kind of improving)</span><br/ ><br/ >'<span class="explanation-format__original">augmented</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(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" .)