The defender made his debut in the midweek win over Reading.
Newcastle United manager Rafa Benitez
The defender is one of a whole host of new signings to arrive at St James Park this summer in a complete overhaul from Rafa Benitez.
He had to wait until this week to make his debut for the club as the Spaniard named him in his side that took on Reading.
Newcastle's Dwight Gayle celebrates scoring their third goal
It proved to be a winning start for him too as his side ran out 4-1 winners to secure their first victory of the season.
And he says it was an amazing feeling to get started, although he only rates his performance as okay.
"The win was the most important thing but it was an amazing feeling to get out there and make my debut," he told nufc.co.uk.
"My performance was okay. I probably should have done better with a header in the first half. I had control of it and should have kept it down, but hopefully next time I get the opportunity I will make better use of it.”
Newcastle's Dwight Gayle celebrates scoring their fourth goal with Isaac Hayden
It now remains to be seen what role that Clark has to play in Newcastle’s first team this season.
With Jamaal Lascelles named as captain, he is likely to be a regular starter for much of the campaign, barring injury.
That leaves the second centre back position a straight fight between Clark, Grant Hanley and Chancel Mbemba and it will be interesting to see which player Rafa Benitez opts for.
Newcastle United manager Rafael Benitez