Berries regularly consumed in Jewish rite (4)

I believe the answer is:

bris

'jewish rite' is the definition.
(I've seen this in another clue)

'berries regularly consumed' is the wordplay.
'regularly consumed' means one should take alternating letters.
The alternating letters of 'berries' are 'BRIS'.

'in' is the link.

I've seen this clue in The Everyman puzzle in The Observer.

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