Crossword Genius

Refereeing manual? (4)

Ross

I believe the answer is:

book

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

This clue might be a double definition.

'refereeing' is the first definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

'manual?' is the second definition.
(manual is a kind of book)

Can you help me to learn more?

(Other definitions for book that I've seen before include "Reserve - bets taken on a race" , "an item from the library" , "Quick work" , "Reserve - publication" , "Leaves, bound" .)

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.