Weirdly frightening (4)
I believe the answer is:
eery
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">weirdly frightening</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 eery that I've seen before include "Weird" , "Strangely frightening" , "Spooky" , "Weirdly frightening" , "Strange" .)