Stream ritual showing baptismal ceremony (5)

I believe the answer is:

amrit

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'ceremony' is the definition.
(I have seen 'sacred ceremony' mean 'amrit' so perhaps 'ceremony' could also mean 'amrit')

I cannot understand how the rest of the clue works.

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(Other definitions for amrit that I've seen before include "sacred ceremony" , "Sikh ceremony" .)

I've seen this clue in The Sunday Times and The Times.

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