Hoodoo (4)
I believe the answer is:
jinx
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hoodoo</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 jinx that I've seen before include "Person or thing thought to bring bad luck" , "Hoodoo" , "Curse" , "Thing or person that brings bad luck" , "Unlucky influence" .)