With timely preparation, professional books inspiring film with nothing omitted (9)
I believe the answer is:
provident
'with timely preparation' is the definition.
(provident means far-sighted or well-prepared)
'professional books inspiring film with nothing omitted' is the wordplay.
'professional' becomes 'pro' (synonyms).
'books' becomes 'NT' (abbreviation for New Testament).
'inspiring' means one lot of letters goes inside another.
'film' becomes 'vid' (short for video).
'with nothing omitted' becomes 'e' (I can't explain this - if you can you should give a lot more credence to this answer).
'pro'+'nt'='pront'
'vid'+'e'='vide'
'pront' going around 'vide' is 'PROVIDENT'.
(Other definitions for provident that I've seen before include "Careful, thrifty" , "Thrifty; far-sighted" , "Providing for future needs" , "Frugal" , "Prudent, far-sighted" .)