Sudden enlightenment achieved by Buddhists at Orient (6)

I believe the answer is:

satori

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'sudden enlightenment' is the definition.
'satori' can be an answer for 'enlightenment' (Buddhist term). I am not sure about the 'sudden' bit.

'achieved by buddhists at orient' is the wordplay.
'SATORI' is hidden within the letters.
But, I am unsure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for satori that I've seen before include "sudden Buddhist enlightenment" , "sudden awakening" , "Sudden enlightenment (Buddhism)" , "awareness all of a sudden" , "enlightened state" .)

I've seen this clue in The Hindu.

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