To form into new state you need energy and quiet spot up in Peru (7)

I believe the answer is:

peptize

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'to form' is the definition.
The definition and answer can be both related to change as well as being verbs in their base form.
Maybe there's an association between them I don't understand?

I don't understand how the rest of the clue works.

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I've seen this clue in The Sunday Times and The Times.

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