Crossword Genius

Mountains show in its pages? (5)

Ross

I believe the answer is:

atlas

I'm a little stuck... Click here to teach me more about this clue!

'mountains' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for atlas that I've seen before include "Sort of book" , "Cartographer's work" , "Giant" , "Segment of spine" , "Titan who supported the heavens" .)

I've seen this clue in The Irish News.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.