By Dan King - Newcastle United Digital Editor
The Wales international defender missed Saturday's defeat at Watford with a hamstring injury sustained in the second half of the previous weekend's win over West Ham.
With fellow full-backs Massadio Haidara and Kevin Mbabu also sidelined along with Jack Colback - who could have been an option to fill in at left-back - McClaren was forced to reshuffle his pack at Vicarage Road.
McClaren praised Aarons' display afterwards while Lascelles capped an impressive showing with a towering header in the second half, but United's head coach admitted that he would like to have a recognised left-back available when Newcastle travel to Goodison Park next week.
He told nufc.co.uk: "We've got Everton next in eight days.
"We expect Dummett to be back, maybe Jack Colback, and we'll see what else."
Highly-rated young right-back Jamie Sterry suffered a minor hip flexor strain last week, which is likely to keep him out for around a fortnight, but Steven Taylor returned to the squad at Vicarage Road having missed four months with a hamstring injury.