Volume, publication (4)
I believe the answer is:
tome
I believe this clue is a double definition.
'volume' is the first definition.
(a tome is a large or heavy book)
'publication' is the second definition.
(I know that tome is a type of book)
(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" .)