Pull out most of pages (5)
I believe the answer is:
leave
'pull out' is the definition.
(pull out can mean to leave or vacate an area)
'most of pages' is the wordplay.
'most of' means to remove the last letter.
'pages' becomes 'leaves' (leaves can mean the pages of a book).
'leaves' with its final letter taken off is 'LEAVE'.
(Other definitions for leave that I've seen before include "Permission to go; allow to remain" , "Relinquish - holiday" , "Go (5)" , "Go away on holiday" , "Permission to do something" .)