Cook in hot water (4)
I believe the answer is:
boil
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cook in hot water</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 boil that I've seen before include "Painful sore" , "Cook in hot water" , "Bubble up - inflamed swelling" , "Cook, swelling" , "Eruption of the skin" .)