Arm, for example (4)

I believe the answer is:
limb
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">arm for example</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that arm is a type of limb)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for limb that I've seen before include "Part of body or branch of tree" , "Eg wing" , "Jointed appendage" , "Branch - arm - leg" , "A supporter" .)