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Total bliss! Within hidden message, reveal odds (7)

Ross

I believe the answer is:

nirvana

I'm a little stuck... Click here to teach me more about this clue!

'total bliss' is the definition.
'nirvana' can be an answer for 'bliss' (blissful state in Buddhism). I am unsure of the 'total' bit.

'within hidden message reveal odds' is the wordplay.
I cannot really see how this works, but
'message' could be 'an' (AN is an example) and 'an' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for nirvana that I've seen before include "In Buddhist teaching, the place of perfect bliss" , "State of pure happiness" , "Buddhist 23" , "State of perfect happiness" , "blessed release" .)

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