Entering with pun, sorry (not sorry) (11)

I believe the answer is:

unrepenting

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'sorry' is the definition.
Both the answer and definition are adjectives.
Maybe there's a link between them I don't understand?

'entering with pun sorry' is the wordplay.
'with' is a charade indicator (letters next to each other).
'sorry' indicates an anagram (sorry can mean poor-quality or wretched).
'entering' after 'pun' is 'punentering'.
'punentering' anagrammed gives 'UNREPENTING'.

'not' is the link.

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