Heightened (8)
I believe the answer is:
enhanced
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">heightened</span>' is the definition.<br/ ><span class="explanation-format__explanation">('enhance' can be a synonym of 'heighten')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for enhanced that I've seen before include "Heightened" , "Increased in value or quality" , "Sexed-up" , "And hence? (anag)" , "Increased number" .)