Absolutely clean (8)
I believe the answer is:
spotless
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">absolutely clean</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for spotless that I've seen before include "Without blemish" , "free from sin" , "Without a mark, completely clean" , "Absolutely pure, clean" , "Immaculate" .)