Eck reckons today's home date against Wigan Athletic will inspire N'Zogbia.
McLeish said: "Charles has got everything in his locker, he's just got to put it all together.
"Playing against his old club could be what kickstarts his Villa career, if he's selected.
"The inspiration for Charles, with due respect to Wigan, is he's at a bigger club now and the expectation levels are higher.
"I'm sure he realises that. But we have competition for places now. I expect Charles to show his old team-mates what they're missing.
"I'm expecting Charles to be turning it on and creating for us in the final third in every game. I've seen him produce in moments, against Wolves and Blackburn."