Lower digit (3)
I believe the answer is:
toe
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lower digit</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for toe that I've seen before include "Pedal extremity" , "Feature of footwear" , "End of foot" , "Digit; kick" , "Foot extremity." .)