Front part of the lower leg (4)
I believe the answer is:
shin
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">front part of the lower leg</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 shin that I've seen before include "Climb" , "Lower foreleg" , "kick" , "Body part" , "piece of beef" .)