Vanished (4)
I believe the answer is:
gone
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">vanished</span>' is the definition.<br/ ><span class="explanation-format__explanation">(gone can mean vanished or disappeared)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for gone that I've seen before include "Moved - died" , "Departed, left" , "Departed or dead" , "No longer present" , "Well in the past" .)