Improper treatment (6)
I believe the answer is:
misuse
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">improper treatment</span>' is the definition.<br/ ><span class="explanation-format__explanation">(wrong or improper use)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for misuse that I've seen before include "Treat the wrong way or for the wrong purpose" , "Wrongful employment" , "Mistreat, misapply" , "Employ or apply wrongly" , "Poor treatment" .)