Liverpool under-23s beat their Manchester United counterparts in an eight-goal thriller in which both sides played the last half-hour with 10 men.
There was a red card apiece in the 61st minute, with Liverpool leading 5-1 at the time after a composed performance which blew their hosts away.
Liverpool midfielder Leighton Clarke was sent off for the kind of challenge that wouldn't have been out of place in a senior clash between the two bitter rivals.
And United forward Shola Shoretire also saw red after he shoved Clarkson in reaction to the incident.
There was time for a late fightback from United, who fired two more goals for a final 5-3 scoreline that made the result look closer than it had been for much of the game.
Clarkson gave Liverpool an early lead after being set up by Jack Bearne, who would go on to score two goals himself.
Ben Woodburn doubled his side's advantage with a shot that deflected off Di'Shon Bernard, before the Wales striker teed up Bearne for the first of his goals.
Anthony Elanga reduced the deficit for United, but Bearne scored again before Luis Longstaff netted to make it 5-1 to the visitors.
Then came the agricultural challenge from Clarkson which saw both sides on reduced manpower for the final half-hour.
Hannibal Mejbri and Charlie McCann scored late on as United achieved some respectability during the 10-versus-10 contest.
But it was too late to salvage a result as Treble-winning legend Dwight Yorke watched from the bench, having been working with Neil Wood's U23 squad recently.
United were missing several players who starred for the U23s last term.
Teden Mengi is currently with Ole Gunnar Solskjaer's first team, while James Garner, Dylan Levitt, Tahith Chong, Matej Kovar and Aliou Traore are all out on loan.
Ethan Galbraith, Ethan Laird, Reece Devine and D'mani Mellor are all injured, while Angel Gomes and Largie Ramizani have both left the club.
Meanwhile, the comprehensive win for Barry Lewtas's Liverpool side showed that it's not just Jurgen Klopp's first team who are on top of their game at the moment, with plenty of talented youngsters hoping to be part of a bright future at Anfield.
