Blueprint to make un-named Disney film (7)
I believe the answer is:
formula
'blueprint' is the definition.
(thesaurus)
'to make un-named disney film' is the wordplay.
I cannot quite understand how this works, but
'to' could be 'for' and 'for' is found within the answer.
'film' could be 'm' (1931 Fritz Lang film) and 'm' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for formula that I've seen before include "Regular approach" , "Milk substitue for babies" , "Category in motor racing" , "Mathematical expression for solving problems" , "Recipe or list of ingredients" .)