Exactly how they achieved that would be worthy of a small dissertation, especially as they twice pressed down on Clare to force two periods of extra-time, before winning the new 65-metre free-taking shoot-out created to eliminate the need for a replay.
In fact, he scored Clare's last seven points from a combination of frees and play to amass 15 points in all in normal time.
Then Niall Deasy struck his second effort wide, leaving Ryan with the opportunity to win it for Limerick.
Both sides will look back on this tie and point to occasions when they could have picked off a score or conceded one which could have led to a result in normal time. Limerick got to within a point as Gillane's frees kept them in touch but Clare then edged three clear again by the 49th minute with Kelly nailing a fifth point and Duggan showing why he has taken over from Kelly as chief free-taker.
Clare had the breeze in the first half and raced ahead to lead 0-6 to 0-2 after 10-minutes.
Goals proved crucial in this tie and when Guillane got through for his and Limerick's second at the turn of the final quarter, the home side were in front for the first time.
With the lead out to nine points nad Limerick without a score in 16-minutes, Aaron Gillane popped up with a goal for the home side - kicking to the net to leave it 1-2 to 0-11 after 22-minutes. C Galvin, C McGrath, S O'Donnell all 0-1 each. 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. David Reidy for Kyle Hayes (62 mins) 18. 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.
A 92nd minute free from Diarmuid Byrnes brought the game to another period of extra-time, in which both teams scored twice and brought things to a shootout.
But up the field went Limerick and found another goal - sub Pat Ryan was isolated in front of goal and made no mistake when a long ball was delivered in.
John Conlon pointed Clare into the lead in the third minute of the second period and this point still separated the teams as the game entered one minute of added time.
That got Limerick's mojo working, and Paul Browne and Hegarty added points in quick succession: Limerick finished out the half strong: getting it back to three points, 0-14 to 1-8.
SCORERS: Limerick: Aaron Gillane 1-11 (0-11 frees), Diarmaid Byrnes 1-1 (1-1 frees), Pat Ryan 1-0, Colin Ryan 0-3 (1lineball), Gearoid Hegarty 0-2, Cian Lynch, Tom Morrissey, Paul Browne and Seamus Flanagan 0-1 each. Peter Duggan (Clooney-Quin) 15.
Scorers for Clare: Peter Duggan 0-19 (0-15f, 0-2 '65), Tony Kelly 0-6, David Reidy and John Conlon 0-2 each, Conor McGrath, David Fitzgerald, Shane O'Donnell, Colm Galvin 0-1 each. He looked to have won it for Clare until a Colin Ryan lineball forced extra time. Peter Duggan, Niall Deasy, David Reidy, Ian Galvin and Jamie Shanahan for Clare.
Limerick: N Quaid; S Finn, S Hickey, R English; D Byrnes (1-1, all frees), D Hannon, D Morrissey; P Browne (0-1), C Lynch (0-1); G Hegarty (0-2), K Hayes, T Morrissey (0-1); A Gillane (1-11, 11frees), S Flanagan (0-1), B Murphy.
CLARE: Donal Tuohy; Patrick O'Connor, Conor Cleary, Jack Browne; Seadna Morey, David McInerney, David Fitzgerald; Colm Galvin, Tony Kelly; Cathal Malone, John Conlon, David Reidy; Conor McGrath, Peter Duggan, Shane O'Donnell. Subs: I Galvin for Galvin (52), C McInerney for McGrath (56), J Shanahan for Morey (61), J McCarthy for Reidy (64), P Collins for Malone (68), M O'Neill for C McInerney (FT), R Taylor for I Galvin (89), M O'Malley for Kelly (95), N Deasy for Collins (98).
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