They're connected to the spine (5)

I believe the answer is:

pages

(Other definitions for pages that I've seen before include "Young attendants" , "Book leaves" , "Boy attendants" , "Sheets of a book" , "boys in the hotel" .)

I've seen this clue in The New York Times.

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.