Directory (5)
I believe the answer is:
index
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">directory</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for index that I've seen before include "List of subjects in book" , "Alphabetical guide" , "It points" , "Finger - it's found at end of book" , "Pointing finger" .)