Belief of society long evolving (11)

I believe the answer is:

scientology

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

'belief' is the definition.
(scientology is a belief system)

'society long evolving' is the wordplay.
'society long' anagrams to 'SCIENTOLOGY'.
But, I'm not clear how this is indicated.

'of' acts as a link.

Can you help me to learn more?

(Another definition for scientology that I've seen is " Philosophy".)

I've seen this clue in The Times.

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