City in Brazil without borders closed (6)

I believe the answer is:

santos

'city in brazil' is the definition.
(I've seen this in another clue)

'without borders closed' is the wordplay.
'without' becomes 'sans' (I've seen this in another clue).
'borders' is an insertion indicator (inserted letters are bordered by others).
'closed' becomes 'to' (as in a door closed to).
'sans' going around 'to' is 'SANTOS'.

I've seen this clue in The Guardian.

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