Good side is wrong to have pontificated (9)

I believe the answer is:

moralised

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'pontificated' is the definition.
The answer and definition can be both to do with communicating as well as being past participle verbs.
Perhaps they are linked in a way I don't understand?

'good side is wrong' is the wordplay.
'good' becomes 'moral' (associated in meaning).
'is wrong' indicates anagramming the letters.
'side' with letters rearranged gives 'ised'.
'moral'+'ised'='MORALISED'

'to have' is the link.

Can you help me to learn more?

I've seen this clue in The Daily Express.

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