Adorn, decorate (8)
I believe the answer is:
beautify
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">adorn</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that adorn can be written as beautify)</span><br/ ><br/ >'<span class="explanation-format__original">decorate</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that decorate can be written as beautify)</span><br/ ><br/ ></span>
(Other definitions for beautify that I've seen before include "Make more pretty" , "Make prettier" , "Enhance appearance" , "Make lovely" .)