Unusual Islamic law dealing with the sari (7)

I believe the answer is:

sheriat

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'unusual islamic law' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'dealing with the sari' is the wordplay.
'dealing with' indicates anagramming the letters.
'the'+'sari'='thesari'
'thesari' anagrammed gives 'SHERIAT'.

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I've seen this clue in The Independent.

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