Skin eruption (4)
I believe the answer is:
rash
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">skin eruption</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that rash is a type of skin eruption)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for rash that I've seen before include "Red patch on skin" , "Hotheaded" , "Flood" , "Eruption on skin, imprudent" , "Precipitate" .)