Resent changes on right being more authoritarian (7)

I believe the answer is:

sterner

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'more authoritarian' is the definition.
Both the answer and definition are comparative adjectives. Maybe they are linked in a way I don't understand?

'resent changes on right' is the wordplay.
'changes' is an anagram indicator.
'on' is an insertion indicator (as in clothing \'on\' a person).
'right' becomes 'r' (common abbreviation).
'resent' anagrammed gives 'stener'.
'stener' going around 'r' is 'STERNER'.

'being' is the link.

Can you help me to learn more?

(Other definitions for sterner that I've seen before include "Renters of more strict sort" , "More severe" , "More grimly serious" , "Less easy-going" , "More demanding" .)

I've seen this clue in The Telegraph.

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