Newcastle were beaten 5-1 by Chelsea at Stamford Bridge last Saturday, and they barely threatened during the match.
Aarons was at fault for at least one of the goals that his side conceded, after being selected to start in the unfamiliar position of left-back, but McClaren refused to blame the 20-year-old for the defeat.
“We didn’t have the ideal back four that you would need in terms of stability when you come to somewhere like this,” McClaren said.
“Steven Taylor was playing his second game in six or seven months, and Rolando Aarons – who was tremendous last week – had to play at left-back again.
“He’s only a young lad, and he needs more help from the experience around him.”
Aarons has been forced to play at left-back in a number of Newcastle’s most recent matches, and he has managed to impress when getting forward, but defensively he was exposed against Chelsea.
Aarons is a natural winger, and the Blues took full advantage of his uncomfortableness at the back, as they cruised to victory.
Newcastle’s defeat has seen them fall back into the relegation zone, and their away form is worryingly poor.
The Magpies have been hammered by Everton and Chelsea in their last two away trips, and they are running out of time to turn around their poor form away from St. James’ Park.