Physical training manual? (8,4)
I believe the answer is:
exercise book
'physical training manual?' is the definition.
'exercise book' can be an answer for 'manual?' (thesaurus). I am not certain of the 'physical training' bit.
'training manual?' is the wordplay.
'training' becomes 'exercise' (exercise is a kind of training).
'manual?' becomes 'book' (manual is a kind of book).
'exercise'+'book'='EXERCISE BOOK'
Can you help me to learn more?
(Another definition for exercise book that I've seen is " School item".)