Geographical book (5)
I believe the answer is:
atlas
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">geographical book</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 atlas that I've seen before include "Titan - map book" , "Asian satin" , "Large-format book" , "God" , "Sky carrier - map book" .)