Swelling soother
I believe the answer is:
ice
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">swelling soother</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 ice that I've seen before include "Diamond" , "Block" , "Frozen water; kill (slang)" , "It's cold and slippy" , "To put in a drink or slide on" .)