Satisfying taste of opium a mirage, some found (5)

I believe the answer is:

umami

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'satisfying taste' is the definition.
'umami' can be an answer for 'taste' (I've seen this before). I'm not certain of the 'satisfying' bit.

'opium a mirage some found' is the wordplay.
'some found' says the answer is hidden in the clue.
'UMAMI' is hidden in the letters of 'opium a mirage'.

'of' acts as a link.

Can you help me to learn more?

(Other definitions for umami that I've seen before include "Fifth flavour" , "Japanese word for pleasant savoury taste" , "Savoury flavour" , "Newly discovered taste" , "Savoury taste sensation produced by glutamates - I, a mum (anag)" .)

I've seen this clue in The Guardian.

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