Anticlimax (4,5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">anticlimax</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for let-down that I've seen before include "Anticlimax" , "Disappointment" , "It's disappointing" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">anticlimax</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for damp squib that I've seen before include "Something that fails to have the expected impact" , "Let-down" , "Something unsuccessful" , "Unsuccessful attempt to impress with moist explosive" , "Firework that doesn't" .)