Steve Bruce said the time has come to stop talking about Joelinton's £40million price tag and let the striker get on with his football.
The £40million forward scored one and made one in the 2-0 win at Crystal Palace as United climbed into the top 10.
Bruce hit back at critics with another away win but was keen to talk about Joelinton's performance after the game.
He said: "It doesn't matter about price tag and where you come from, sometimes you need time.
"In Joe's case, the price tag and number nine shirt meant he struggled at times.
"But the kid wants to do well. He has a lot of opportunities tonight but we are starting to see him now with his strength.
"There is no disputing that Joelinton has found it difficult but I've said many times that some take a little more time than others. But we're delighted he's scored a goal.
"I'm delighted with the attitude. It's been a difficult week but we've responded in the right way."
Joelinton and Callum Wilson sealed the three points for Newcastle and Bruce admitted he was concerned about missed chances in the first half.
He said: "We created a few opportunities and missed the right pass and that little bit of quality.
"That bit of quality the two strikers did show they have both scored from. Winning late on is not a bad trait to have.
"The players have responded at the end of a tough week."
