Junction point (4)
I believe the answer is:
node
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">junction point</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for node that I've seen before include "Lump at junction" , "Thickened enlargement" , "Swelling - point of junction" , "Natural swelling of part of a plant or animal" , "branch perhaps at this point" .)