Crossword Genius

The French, all unfamiliar with film (2,2,4)

Ross

I believe the answer is:

la-la land

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'film' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'the french all unfamiliar with' is the wordplay.
'the french' becomes 'la'.
'unfamiliar' indicates an anagram.
'with' becomes 'and' (I've seen this before**).
'all' with letters rearranged gives 'lal'.
'la'+'lal'+'and'='LA-LA LAND'

Can you help me to learn more?

I've seen this clue in The Telegraph.
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