Folder holder (4)
I believe the answer is:
file
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">folder holder</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 file that I've seen before include "Folder; rasp" , "Dossier; line of people" , "Dosssier" , "Set of related records kept together" , "Smoothing tool - orderly batch of documents" .)