Concerning solemn repudiation, out J.A.Barry? Rubbish! (10)

I believe the answer is:

abjuratory

I'm a little stuck... Click here to teach me more about this clue!

'concerning solemn repudiation' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'out j a barry? rubbish' is the wordplay.
'rubbish' is an anagram indicator (a poor quality or rubbish spelling of the letters).
'out'+'j'+'a'+'barry'='outjabarry'
'outjabarry' with letters rearranged gives 'ABJURATORY'.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.