Collection of maps (5)
I believe the answer is:
atlas
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">collection of maps</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for atlas that I've seen before include "Reference work" , "Large-format book" , "Geographical book" , "Cartographer's work" , "Titan with a fearsome burden" .)