Unlimited worms through wharf, reef, or marina (4-4)

I believe the answer is:

free-form

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'unlimited worms through wharf reef or marina' is the definition.
I can't judge whether this defines the answer.

'through wharf reef or marina' is the wordplay.
'through' indicates a hidden word.
'FREE-FORM' is hidden within 'wharf reef or marina'.

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