Sound of an ungraceful landing (4)
I believe the answer is:
thud
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sound of an ungraceful landing</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for thud that I've seen before include "Dull heavy noise" , "Dull sound of something hitting the ground" , "Clunk" , "Noise of dull impact" , "Clonk" .)