Slaying (7)
I believe the answer is:
killing
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">slaying</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for killing that I've seen before include "Fortune" , "Ending life" , "Deadly; funny" , "Terminating a life" , "Slaughtering" .)