Lewis missed the first two weeks of the season due to a suspension coming out of the Hawks' loss to North Melbourne in last year's first semi-final.
When he returned against the Roos in round three, Lewis was again suspended after being reported for striking Daniel Pratt.
“The leadership group has spoken to him,” Clarkson said.
“A lot of our guys are fierce competitors and Jordan’s one of them.
“We love the way they go about their footy but we just don’t want them to get involved in indiscretions like his involvement with Pratt.
“He’s starting to realise that if he channels his aggression to the ball and his opponent when he’s got the ball, then he’ll keep himself on the field and make a really good contribution to our team.”
Meanwhile, Clarkson says the inclusion of Jamie Charman will have a big impact on Saturday night's match between Hawthorn and the Lions, as he rates the ruckman as one of the best in the competition.
“We’ve yet to see if he’ll play with his calf complaint. Only Brisbane know that so we’ll wait to see how that unfolds but when he’s up and going he’s a quality big man.”
Also posing a major threat to Hawthorn’s hopes of making it five wins in a row is the might of the Lions’ forward line, with Jonathan Brown and Daniel Bradshaw both firing.
“They’re probably the most potent forward line going around in the competition so we need to contain them as best we can,” Clarkson said.
“Our best method of limiting their influence is to limit the supply to them. If we can reduce the number of times they go inside 50, it gives our defenders some sort of chance of keeping them in check.”
Defender Trent Croad is back to help the defence curb the Lions’ potent attack. He returns to the side having missed only three matches after dislocating his wrist in round one.
“He’s a strange type of beast Croad; he recovers very quickly from any sort of traumatic injury.
“He’s missed very little footy and part of it is because he’s a big strong brute, but part of it too is that when he does get injured he’s able to rehabilitate himself very quickly.”
This morning Sportsbet announced that Hawks’ young forward Cyril Rioli is second favourite to win the NAB AFL Rising Star Award, despite having not gained a nomination yet.
The Northern Territory teenager’s odds have fallen from $34 earlier in the year to $7.50, but Clarkson says he’s not dwelling on the fact that the 18-year-old is yet to receive a nomination.
“That will take care of itself. We’re just pleased with the contribution he’s making and all the individual accolades, the powers that be will decide that in due course.
“We’re after team bonuses instead of individual bonuses and he’s very aware of that.”
As for the Hawks’ overall performances, the coach believes there’s still room for improvement.
“We’ve been playing okay; I think we can improve a little bit.
“We, perhaps through suspension and injury, haven’t had our best available talent out on the field at any one time this year but then that doesn’t guarantee victory either.”
Although reluctant to get embroiled in the debate regarding Barry Hall’s strike on Brent Staker and his subsequent suspension, Clarkson had some words of praise for the controversial Sydney forward.
“I think he’s handled himself with tremendous dignity over the course of the week,” Clarkson said.
“He’s been hit from all quarters and he’s stood up like a man and taken whatever has come his way, and it says a lot about the man that he’s acknowledged that he’s made an error.
“It’s a very emotional and volatile game this one, and I think he’s handled himself as good as anyone could in those circumstances.”
