Livestream godfather expressing regressive belief (5)

I believe the answer is:

dogma

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'belief' is the definition.
(synonyms)

'livestream godfather expressing regressive' is the wordplay.
'DOGMA' is hidden back-to-front within the letters.
However, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for dogma that I've seen before include "Doctrine put forward as true, not to be questioned" , "Inflexible principle" , "Code of belief" , "Authoritative doctrine" , "Religious doctrine proclaimed as true without proof" .)

I've seen this clue in The Irish Times.

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