Facial disguise (4)
I believe the answer is:
mask
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">facial disguise</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 mask that I've seen before include "Facial disguise" , "False face" , "Visor; disguise" , "Face covering; disguise" , "Cover for the face" .)