Back of the foot (4)
I believe the answer is:
heel
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">back of the foot</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for heel that I've seen before include "that may be Cuban" , "Despicable type" , "Achilles's weak spot" , "A cad and a bounder!" , "tip" .)