Reading the sequences, I think I understand the difference between rationality vs. cleverness on the gut level, as I spent a lot of time wondering about the idea of big and small egos, and cleverness is a lot like big IQ with big ego, but if anyone can recommend good articles I may have missed I would be interested.

I also think Gunnar and Eliezer may cleverness differently, I think Gunnar means it as intelligence and Eliezer means it as intelligence (mis)used to "show off".

As far as I can tell, both are correct, the first is the dictionary definition and the second coming from "clever" being such an often used praise, esp. by parents and teachers that at some point it got associated with seeking that praise, and status, hence the showing-off association.