Training book (6)

I believe the answer is:

manual

(Other definitions for manual that I've seen before include "Physical as opposed to mental work" , "Handy" , "reference book" , "Work-book" , "Operated by hand" .)

I've seen this clue in the King Feature Syndicate.

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.