Rub out, erase (6)
I believe the answer is:
efface
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">rub out</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that rub out can be written as efface)</span><br/ ><br/ >'<span class="explanation-format__original">erase</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that erase can be written as efface)</span><br/ ><br/ ></span>
(Other definitions for efface that I've seen before include "Erase a mark from a surface" , "The selling of goods in large quantities" , "Obliterate by rubbing out" , "Remove all traces of" , "Expunge, delete" .)