Volume, publication (4)
I believe the answer is:
tome
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">volume</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(a tome is a large or heavy book)</span><br/ ><br/ >'<span class="explanation-format__original">publication</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that tome is a type of book)</span><br/ ><br/ ></span>
(Other definitions for tome that I've seen before include "Large heavy book" , "Large scholarly volume" , "Big book" , "War and Peace, say" , "Large, weighty book" .)