Tiny splash (4)
I believe the answer is:
plop
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tiny splash</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 plop that I've seen before include "Sound of a stone hitting water" , "Noise of a small object dropping into water" , "Report making little splash" , "Sound of a stone landing in water" , "Sound of object falling into water without a splash" .)