Want to leave Botswana? Get court order! (4)

I believe the answer is:

asbo

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'court order' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

(Other definitions for asbo that I've seen before include "Order given to anti-social yobs" , "Punitive order" , "troublemaker's punishment" , "Award for bad behaviour?" , "Court restraining order" .)

I've seen this clue in the Irish Times (Crosaire) and the Irish Times.

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