Wailing spirit (7)
I believe the answer is:
banshee
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wailing spirit</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for banshee that I've seen before include "Wailing female spirit" , "Ominous wailing spirit" , "She predicts death in Ireland" , "Sign of imminent death" , "Irish female spirit who warns of an impending death" .)