Original sinner (4)
I believe the answer is:
adam
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">original sinner</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for adam that I've seen before include "the first orphan?" , "Man No. 1" , "Father of Cain and Abel" , "who transformed Palladian architecture?" , "First man in the Bible" .)