Verity (5)
I believe the answer is:
truth
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">verity</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for truth that I've seen before include "Veracity; established fact" , "Verified fact" , "Veracity, faithfulness" , "Gospel" , "Honesty" .)