People from town in Kent evict established one (4)

I believe the answer is:

folk

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'established one' is the definition.
'folk' can be an answer for 'established' (thesaurus). I am not certain of the 'one' bit.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for folk that I've seen before include "[KINDRED]" , "People; type of music" , "Kind of music" , "Sort of music" , "People in general" .)

I've seen this clue in The Guardian.

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