Food supplier supporting film, Raw Rock (9)

I believe the answer is:

providore

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'food supplier' is the definition.
I know nothing about this answer so I can't tell whether this works.

'supporting film raw rock' is the wordplay.
'supporting' becomes 'pro' (being pro something is supporting it).
'film' becomes 'vid' (short for video).
'raw rock' becomes 'ore' (I've seen this in another clue).
'pro'+'vid'+'ore'='PROVIDORE'

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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