Bathos (10)
I believe the answer is:
anticlimax
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bathos</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for anticlimax that I've seen before include "Disappointing ending" , "Come-down" , "Let-down after excitement" , "Disappointing end" , "Disappointing result" .)