A player like Clarkson could be of interest to the Habs. However, you really need to wait on that. See how the rest of the payroll shakes out, because Clarkson's contract is a huge premium for what he does, and it's likely/hopeful that the Habs won't have any room to take on any more premium contracts. Chasing a physical winger on the UFA market would be a priority ahead of trading for Clarkson too.
But I guess if for some reason you hit August, didn't have anybody left to sign in that role as a UFA, had oodles of cap-space remaining... well, maybe. Mind you, by that time the Devils will have their payroll sorted out too, and if LL loves Clarkson so much, I guess there would be no further point to them just dumping him off before camp.
Not many devils earned their paycheck last year. Clarkson was one of them. It's amazing what a coach can do. He played a lot better near the end if the year. The year before he played a lot better and earned a nice paycheck. He could return to that form as a third line 25 goal guy.