Spider's construction (3)
I believe the answer is:
web
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">spider's construction</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 web that I've seen before include "The worldwide one is a computer network" , "Tangle" , "Insect trap" , "Complicated plot" , "Network (maybe worldwide?)" .)