Scholarly book (4)
I believe the answer is:
tome
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">scholarly book</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 tome that I've seen before include "Heavy volume" , "Large, weighty book" , "Large scholarly volume" , "Large and scholarly book" , "Big book" .)