Sorrowful drop
I believe the answer is:
tear
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sorrowful drop</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tear that I've seen before include "Move quickly; pull apart" , "It's secreted by the lachrymal gland" , "A globule of eye moisture" , "Lachrymal fluid" , "Small flaw, as in glass" .)