Ayn Rand's titular Titan (5)
I believe the answer is:
atlas
'ayn rand's titular titan' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for atlas that I've seen before include "Album of maps" , "African mountain range" , "N African mountains - seemaps book" , "Book of maps or charts" , "Cartographer's work" .)