Tending to cause harm (11)
I believe the answer is:
detrimental
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tending to cause harm</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for detrimental that I've seen before include "which is bad for one" , "not helpful" , "Harmful; admit, relent (anag.)" , "Causing harm" , "Tending to cause harm" .)