Geelong clicked when it counted, turning a tight contest into a blowout and extending its winning streak over North Melbourne to 15 matches.

When Jy Simpkin kicked a goal 29 minutes into the third term of Saturday's twilight game at GHMBA Stadium, the Kangaroos only trailed by four points.

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Cats forward Shannon Neale then closed out the quarter with two goals in as many minutes, before Geelong ran rampant in the final term for a 49-point win.

Despite giving up the first four goals of the game, the Kangaroos were right in the contest until the closing stages of the third term.

It's a hard pill to swallow for North Melbourne coach Alastair Clarkson, with the Roos letting a competitive performance slip late against a more "polished and clean" Geelong side.

"It's a difficult one. We're pleased we competed so strongly for a big portion of the game but obviously disappointed that we couldn't maintain the rage in that space," Clarkson said.

"When the game was opened up and the pressure came out of the game a little bit, they were able to score freely and they're hard to stop when they get forward momentum like that.

"We were just little bit sloppy with ball in hands, some of that was to do with the pressure that Geelong applied, but some of it was just errors that we made with the ball that we need to be better at.

"I just thought they were more polished and clean with the footy when they had their opportunities.

"In the times where we could have punished them with our ball use we just weren't quite as polished as they were ... we gave up some footy at crucial stages that allowed them to retain the ball in their front half and ultimately that overwhelmed us in the end."