Brilliance, magnificence (9)
I believe the answer is:
splendour
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">brilliance</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that brilliance can be written as splendour)</span><br/ ><br/ >'<span class="explanation-format__original">magnificence</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that magnificence can be written as splendour)</span><br/ ><br/ ></span>
(Other definitions for splendour that I've seen before include "Magnificent appearance" , "Magnificence, brilliance" , "Brilliant appearance" , "show" , "Grandeur" .)