Visit a shop and be condescending (9)

I believe the answer is:

patronise

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'visit' is the definition.
Both the answer and definition are verbs in their base form.
Perhaps there's an association between them I don't understand?

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

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(Other definitions for patronise that I've seen before include "Sponsor" , "Finance" , "Give encouragement or treat with condescension" , "Frequent as customer" , "champion" .)

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

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