Wanton (7)
I believe the answer is:
rampant
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wanton</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for rampant that I've seen before include "Rife" , "running wild" , "Fulminate" , "Showing unchecked growth" , "Unchecked - standing up on hind legs" .)