Billy Bagron's winner 16 seconds into overtime gave Dundee Stars a huge win as they completed four wins out of four.
Just 24 hours after a shock 5-2 win over Elite League champions Belfast Giants in Northern Ireland, they upset the new-look Clan - who iced two debutants - to claim the points.
Braehead had new netminder Daren Machesney and Toms Hartmanis starting plus the returning Jade Galbraith as they tried to put their marker on the season.
But Bagron's winner put paid to any early hopes Clan coach Jordan Krestanovich had of arresting what is now a five game winless home run and only two victories in 11.
Sami Ryhanen opened the scoring on 11 minutes when his close range shot beat Machesney, with the puck coming off the Clan keeper's skate on its way.
But Hartmanis got his name on the scoresheet to equalise when he easily tapped in after Stars' goalie Nic Riopel saved Rob Farmer's chance.
The Dundee netminder was a major difference as he stopped chances from Kevin Phillips, Krestanovich and Matt Haywood all being denied.
But it was Haywood who edged his team in front as he smashed the puck diagonally past Riopel and the home team went 2-1 ahead early in the second period.
The game was a closely-fought affair and both sides were evenly-matched, so it came as no surprise that the Stars regained parity again.
Ryhanen's delivery into the Clan area gained height, with Doug Krantz taking a swipe at it and finding enough contact to direct beyond Machesney.
Dundee's joy was short-lived though when Haywood struck his second of the night, burying the puck from close range after Ash Goldie's chance was stopped.
But Mike Wirll, a former Clan player, struck from the right channel to equalise again before the second interval and the match was finely poised.
Nothing could separate them in the final period, although Davide Nicoletti went closest as his chance crashed off the post.
However, it needed overtime, where Bagron popped up at the right time, despatching his shot past Machesney for Jeff Hutchins' side to claim two Conference points.
Dundee coach Jeff Hutchins: "I didn't think we played out best game, but we got some bounces and luck seems to be going for us just now.
"Sami Ryhanen and Mike Wirll have been great and not only are they scoring and getting points, they've been mucking in with defence and that's been a major difference for us.
Braehead Clan player-coach Jordan Krestanovich: "I believe we were the better team and should have won. Our system is working, but we're not getting the breaks.