Tip out (liquid) (4)
I believe the answer is:
pour
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tip out liquid</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for pour that I've seen before include "Serve liquid" , "bucket" , "Tip liquid from container" , "Give out liquid" , "Pelt - decant" .)