Cruel, barbaric (7)
I believe the answer is:
inhuman
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">cruel</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(inhuman can mean cruel or inhumane)</span><br/ ><br/ >'<span class="explanation-format__original">barbaric</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for inhuman that I've seen before include "Savage, brutal" , "Cruel, barbaric" , "barbarous and brutal" , "Without compunction" , "Nasty" .)