Bugbear (8)
I believe the answer is:
bogeyman
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bugbear</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that bugbear can be written as bogeyman)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for bogeyman that I've seen before include "Unpleasant character" , "Imaginary male feared by children" , "Scary personification?" , "Dreadful imaginary being" , "devil" .)