Cad, rotter (4)
I believe the answer is:
heel
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">cad</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that cad can be written as heel)</span><br/ ><br/ >'<span class="explanation-format__original">rotter</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for heel that I've seen before include "Tilt" , "Crusty end of a loaf" , "Part of shoe; bad person" , "Lean over; part of foot" , "American rotter or shoe part" .)