An additional two - five minute periods of extra time failed to separate the sides - finishing Clare 33 points - Limerick's 4 goals 21 after a thrilling batlle.
Each side converted their five which led to sudden death.
The came sudden death and Pallasgreen's Colin Ryan was the Limerick hero.
This was a period when Limerick had six wides and points from Cian Lynch and Tom Morrissey.
But the early Clare radar was in tone early on with Conor McGrath, Tony Kelly, Colm Galvin and David Reidy all finding the mark.
That advantage was soon out to 0-11 to 0-2 with 22 minutes played - Peter Duggan with four successive points from placed balls.
Clare were 11 points to 2 up, early in the first half, before an Aaron Gillane goal for Limerick helped them to power ahead, but the Shannonsiders continued to trail the banner by 3 points at half time at the Gaelic Grounds. When the same player added frees the lead was down to four points with 10 minutes to the break. Clare led by Peter Duggan battled back and had the lead in injury time until Ryan struck. At the mid-point of the second half Clare were still ahead, 0-17 to 0-11 with two Kelly points for the men in saffron and blue.More news: Piper Jaffray Companies Analysts Give Gulfport Energy (GPOR) a $16.00 Price Target
Then came sub Colin Ryan and with his first two shots he had two points and the game was down to a single point. Gillane's goal was a beauty, albeit started by David McInerney's miscued ball around midfield: Tom Morrissey latched onto it, passed off to Seamus Flanagan, who set up Gillane for the finish on 54 minutes.
That left it 3-15 to 0-21 with 62 minutes played. Peter Duggan (Clooney-Quin) 15. He hit 0-15 in normal time - two from play.
Ryan also forced extra time with a sideline ball in injury time after the lead was exchanged hands numerous time coming down the home straight.
Clare looked on course for the win in the second period with Limerick unable to score.
It was Diarmaid Byrnes that kept the tie alive for Limerick with a free at the death of extra time, this tie had it all.
Limerick 4-18 Clare 0-30 after extra time.
John Conlon looked to have won it for Clare but an Aaron Gillane pointed free in injury time ensured the sides were level after 100-minutes of action.More news: Children with Down's Syndrome take part in special Carpool Karaoke
Just how much a slog of a game like this adds further weight to the argument against the need for hurling league quarter-finals remains to be seen - particularly as the weather blows holes into the GAA's master fixture plan. Five from each time on the '65. Jamie Shanahan for Seadna Morey (60 mins) 25.
All 10 scored, leading to sudden death. Suddenly they put the pedal to the metal - Gillane kicking home the first goal on 23 minutes, with pure determination as much as deftness, after latching on to a long back from Seamus Hickey.
Peter Duggan scored 0-19 but finished on the losing side, as Limerick beat Clare after a free-taking competition.
That wasn't before Colin Ryan hit a stellar sideline cut to bring it into extra time initially. Peter Duggan, Niall Deasy, David Reidy, Ian Galvin and Jamie Shanahan for Clare.
LIMERICK: Nickie Quaid; Sean Finn, Seamus Hickey, Richie English; Diarmaid Byrnes, Declan Hannon, Dan Morrissey; Paul Browne, Cian Lynch; Kyle Hayes, Gearoid Hegarty, Tom Morrissey; Aaron Gillane, Seamus Flanagan, Barry Murphy.
Limerick substitute Colin Ryan closed the gap to one point again with back-to-back scores before David Reidy pushed it back out to two.
Clare - P Duggan 0-19 (15fs, 2 65s), T Kelly 0-6, D Reidy, J Conlon 0-2 each, D Fitzgerald. Subs: I Galvin for C Galvin (51), C McInerney for McGrath (57), J McCarthy for Reidy (63), M O'Neill for McInerney (70), R Taylor for Ian Galvin (89), M O'Malley for Kelly (95), N Deasy for Collins (98).More news: Del Potro edges Federer in a thriller