Physical training manuals? (8,5)
I believe the answer is:
exercise books
'physical' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'training manuals?' is the wordplay.
'training' becomes 'exercise' (exercise is a kind of training).
'manuals?' becomes 'books' (manual is a kind of book).
'exercise'+'books'='EXERCISE BOOKS'
Can you help me to learn more?
(Another definition for exercise books that I've seen is " Items used by pupils for notes, homework etc".)