The winger is no stranger to Clark, having played for him during his time as a coach at the Magpies. The 21-year-old has initially joined Blues on a short-term deal until April 1.
“I knew him (Clark) when I was 15 at Newcastle and he was great to me then,” said Ferguson. “He’s wanted me for the past couple of years, but Newcastle didn’t want me to go at the time.
“At the start of the year the squad was so small that none of the lads could get out and I was playing too. But then the new lads came in and I had the chance to go and get some more experience under my belt and I was really happy about that.”
In addition to playing on the left-wing, the Derry-born youngster can also slot in at left-back if needed.
Asked what he thought he could bring to the team, he said. “I’m a natural winger. I like to be direct and get down the line and get as many crosses as I can into the box. I try to be creative and affect the game. I can also play left-back, so it’s wherever the manager needs me.
“Hopefully I can just play as much as I can, gain experience and help the team push up the table. Birmingham is a huge club and hopefully we can get higher and progress from here. It should be a good experience.”
The Northern Ireland international goes straight into the Blues squad for Saturday’s away game against Hull City and he is relishing the challenge.
“It’s a great game to come into and I can’t wait,” he added. “I know a few of the lads at Hull and they seem to be doing well this season so it should be a good game.”