Rampant (8)
I believe the answer is:
epidemic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rampant</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for epidemic that I've seen before include "Widespread occurrence of a disease" , "Rash" , "Prevalent disease" , "health emergency" , "spreading disease" .)