Unyielding Abbot discovered rule embraced by upright devotees (8)

I believe the answer is:

stubborn

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'unyielding' is the definition.
(similar in meaning)

'abbot discovered rule embraced by upright devotees' is the wordplay.
'discovered' indicates the central letters (dis-covered - outer letters removed).
'rule' becomes 'r' (legal abbreviation).
'embraced by' is an insertion indicator.
'upright devotees' becomes 'stun' (I can't justify this - if you can you should give a lot more credence to this answer).
The middle of 'abbot' is 'bbo'.
'bbo'+'r'='bbor'
'bbor' inserted inside 'stun' is 'STUBBORN'.

Can you help me to learn more?

(Other definitions for stubborn that I've seen before include "Obstinate, unwilling to yield" , "Obstinate, pig-headed" , "Obstinate, unyielding" , "Strong-willed" , "Obstinate, tenacious" .)

I've seen this clue in The Independent.

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