Liver secretion (4)
I believe the answer is:
bile
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">liver secretion</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 bile that I've seen before include "Anger, bitterness" , "Peevish temper; a liver secretion" , "Digestive juice secreted by the liver" , "Irritability, bad temper" , "Bitter fluid from the liver" .)