Deletion
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">deletion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(erasure is a kind of deletion)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for erasure that I've seen before include "Process of rubbing out" , "Band with Andy Bell and Vince Clarke, or wipe-out" , "Obliteration of data" , "group from the 80s" , "Removal" .)