Wet soft earth (3)
I believe the answer is:
mud
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wet soft earth</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 mud that I've seen before include "Muck - actionable remarks" , "Here's . . . in your eye - it's a toast" , "damaging allegations" , "Liquid earth" , "Alluvial deposit as in river bed" .)