Nina Carberry became the second female jockey to win the Irish Grand National when she partnered Organisedconfusion (12-1) for her uncle, Arthur Moore to take the Ladbrokes sponsored event at Fairyhouse.
Carberry timed her challenge to absolute perfection on the inexperienced six-year-old.
Deal Done helped force a generous pace and despite being headed by Hughies Grey at halfway, he found himself back in front inside the final half a mile.
Deal Done's stablemate, Western Charmer, loomed up and looked a huge threat.
There were also plenty of other horses in with chances at the second-last, including Tony McCoy on Quantitativeeasing.
But it was Carberry who finished the strongest in the Fairyhouse sunshine, beating Western Charmer by five lengths.
Sunnyhillboy stayed on well to take third, with Quiscover Fontaine in fourth.
Moore said afterwards: 'He's a lovely horse - so laid-back. We were a bit worried with him only being six but he has a great engine.
'He has a fantastic temperament and has never run a bad race.
We'll give him a good break and he'll still be a big baby when he comes back.
'It was the obvious race for him after the Leopardstown Chase.
It's a great family occasion with Nina on board. It's magic to bring this off for some super people.'
The winner was given a quote of 25-1 by Stan James for the Grand National at Aintree next April, while William Hill went 33-1.
In the other races, Colm Murphy's mare Voler La Vedette broke Willie Mullins' recent stranglehold on the Keelings Irish Strawberry Hurdle.
Mullins was seeking a fifth straight win in the Grade 2 and his Blackstairmountain looked to have the race in safe keeping after easing to the front over the final flight.
But, not for the first time in his career, Blackstairmountain appeared to hang fire at the head of affairs, leaving the door open for 11-8 favourite Voler La Vedette, who fought back under Andrew Lynch and won by a length and a half.
Prima Vista (5-2) returned to winning ways for Noel Meade in the Rathbarry & Glenview Studs Novice Hurdle.
Given a break since losing out to Dare To Doubt at Naas in February, he reversed the form with that mare, who managed only third, and beat Rathlin by a length and three quarters.
The Most Stylish Lady Novice Handicap Chase went to 9-1 shot Un Hinged, ridden by David Casey and trained by John Coleman, while Marlay Park (12-1) took The Irish Field Handicap Hurdle for Margaret Mullins and Danny Mullins.
Simonsig (11-4 favourite) looks a terrific prospect for trainer Ian Ferguson after his 13-length victory under Chris Cully in the Irish Racing Post Champion Point-To-Point Bumper.
The John Fowler Memorial EBF Mares Chase was won by Coscorrig (4-1), while Arklow Ger landed the Follow Us On Facebook Handicap Chase at 9-1.
