Where one may find a movie director — somewhere on the big picture? (5)
I believe the answer is:
inset
This could be a double definition.
'where one may find a movie director somewhere on the big' is the first definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'picture?' is the second definition.
(inset is a kind of picture)
Can you help me to learn more?
(Other definitions for inset that I've seen before include "Small diagram contained by larger one" , "Small piece inserted" , "Place within" , "Small picture inserted within a larger one" , "Smaller map" .)