Modification (10)
I believe the answer is:
alteration
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">modification</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that modification can be written as alteration)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for alteration that I've seen before include "Adjustment" , "Amendment" , "Change" .)