Papers replacing popular section of comment? That's tyranny (10)

'tyranny' is the definition.
(thesaurus)

'papers replacing popular section of comment?' is the wordplay.
I cannot really see how this works, but
'papers' could be 'press' (the newspaper industry) and 'press' is found in the answer.
'of' could be 'o' and 'o' is found within the answer.
The remaining letters 'pion' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

'that's' is the link.

Can you help me to learn more?