'Corollary' does not mean what the composer thinks it means. Otherwise, a good puzzle. Managed to solve it despite the 'Corollary' issue.

Denoument means unravelling

"irish regions" and "outcomes" not accepted?!!!!!!

Didn't allow Irish Counties

Really easy but nice!

I thought Meath was a county, not a province, so I got confused. Provinces are made up of counties.

nice grid. Some clever crossovers. Not too difficult but took some thought.

wtf man. irish?

I said "counties" for the provinces....

Good, but not great. Fair enough to be strict about counties vs provinces (though I feel Ireland or Irish should have been sufficient, really) but I'm pretty sure corollary doesn't strictly mean result. I'd have solved it in less than half the time if that group had actually been genuine synonyms. I've also never heard of duff as a synonym for steal.