Jonah (4)
I believe the answer is:
jinx
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">jonah</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that jonah can be written as jinx)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for jinx that I've seen before include "Evil spell" , "Bringer of bad luck" , "Hex or voodoo" , "Curse" , "Thing or person that brings bad luck" .)