All Blacks first five-eighths Beauden Barrett had saved the day with try-saving tackle moments from the end of the game.
"We know how much motivation Scotland will have to come into this game," he said.
If he is selected, Clarke is keen to get more involved with the ball after a lack of chances in Cardiff at the weekend.
Clarke said it felt weird in such a high-scoring game not to have seen more ball playing under the roof at Principality Stadium, a view he shared with Welsh marker Louis Rees-Zammit.
"There was a bit of dew out there so it was a real forward game but really happy with the win."
He said it was inspirational watching the forwards rumbling forward so often it made him feel like joining in.
Clarke said it would be another physical contest against Scotland.
"It will be a tough-fought match on all parts of the field. We know their threats out wide as well. They get over the ball, so I think it's going to be a one-to-23, and it will take a whole squad to take down Scotland.
Loose forward Akira Ioane said the pack wanted to take another step up from their effort against Japan, and they were looking for another step-up against Scotland.
"It was a good training day today, and we are looking forward to our main training day on Friday. We're prepping well and slowly building into the week.
"Scotland will be good, they've got a lot of threats over the ball and a lot of speed and a lot of strength out wide. They'll be a good team and we can't take them lightly."
Scotland would still be hurting from their loss in their last game with the All Blacks in 2017, and they would come out with all guns blazing.
"We've got to match that and make sure we're ready and up for it.
"Our breakdown is going to have to be on point because if it's not then they're going to steal a lot of ball."