Eg, arm or leg (4)
I believe the answer is:
limb
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">eg arm</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that arm is a type of limb)</span><br/ ><br/ >'<span class="explanation-format__original">leg</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for limb that I've seen before include "Part of body or branch of tree" , "Arm, leg or wing" , "Eg, arm, leg" , "Large tree branch" , "Tentacle" .)