Crossword Genius

Where one may find a movie director — somewhere on the big picture? (5)

Ross

I believe the answer is:

inset

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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" .)

I've seen this clue in The Hindu.
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