Collection of books (7)
I believe the answer is:
library
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">collection of books</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for library that I've seen before include "Supply of reading material" , "Bibliotheca" , "Building housing book collection, may be public" , "Repository for books" , "Book room" .)