Some prevent film about ways to become better (4-11)

I believe the answer is:

self-improvement

I'm a little stuck... Click here to teach me more about this clue!

'ways to become better' is the definition.
I can't judge whether this defines the answer.

'some prevent film about' is the wordplay.
'about' is an anagram indicator.
'some'+'prevent'+'film'='somepreventfilm'
'somepreventfilm' anagrammed gives 'SELF-IMPROVEMENT'.

Can you help me to learn more?

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

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