Gary Johnson´s side fell behind to a goal from Darren Ambrose in the eighth minute at The Valley, where he coolly slotted the ball past Adriano Basso from 12 yards.
But centre-half McCombe - who had not scored all season until a fortnight ago - made it three goals in four games, rising unmarked to nod Lee Johnson´s corner past goalkeeper Nicky Weaver in the 62nd minute.
Copyright (c) PA Sport 2008, All Rights Reserved.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: http://gms.to/writeforgms