Let fall (4)
I believe the answer is:
drop
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">let fall</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for drop that I've seen before include "Sweet; fall" , "Fail to hold" , "Let fall" , "Finish with" , "small amount of alcohol" .)