The teenager completed his loan move from Manchester United over the weekend, having spent the first half of the campaign on loan at stricken Sheffield Wednesday. He became the Canaries' second January signing after Ali Ahmed.
City weren't originally targeting a left-back in this window, but a change in circumstances with Lucien Mahovo's injury forced them into the market. Clement is hopeful Amass can provide quality competition in that area of the pitch.
"First, it was not in our plans a few weeks ago to bring in a left full-back. With Ben and Lucien, we have two really promising talents for now and for the future. But because of the injury of Lucien, which will be longer term, we needed somebody in that position," Clement said.
"The recruitment team was really fast in coming up with Harry's name. Some people from the staff knew him already from before. I watched some games, and I was directly impressed by what he did already at Sheffield Wednesday, so it would be a good fit in the way we want to play football.
"I think for him it's also a good step to come here. In a young, exciting team where we want to build from the back, and that's also important for the player that he is. So I think for both sides this can be a win-win situation.
"It's very positive that he can step into all the training sessions directly, that he played a lot of game minutes also, and he showed his physicality in those game minutes.
"Physically, he's ready to do the job for the team. You need to integrate yourself into a new team with a lot of new faces, and you need to adapt to everybody in the way the other players play, but I'm very positive about his first training.
"I heard also after the first training session that several players said, 'very interesting player'. That's the best way to come into a club."
City beat significant opposition to the capture of Amass, with Manchester United also persuaded that Carrow Road was the perfect next step for the youngster.
Injury to Lucien Mahovo forced Norwich City back into the market for a left back. (Image: Paul Chesterton/Focus Images Ltd)
"We're always honest in these talks with players. It's not that we sell them gold and golden stories. It's about honesty," he said.
"I think it also has to do with the evolution of the team over the last couple of weeks, that people see the way the team is playing and the way that young players are developing. Maybe also in my old teams before, there were always a lot of young talent coming to the surface, getting chances and growing. That will also be a part of the story.
"If somebody steps in, he needs to get to know all the principles and the way you want to play and all these things."