Rub out (5)
I believe the answer is:
erase
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rub out</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that rub out can be written as erase)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for erase that I've seen before include "Clear" , "score" , "Do away with" , "Obliterate" , "Remove, wipe out" .)