I've been leafing through my Oxford Dictionary of Politics, and there are a few entries where the editors or writers have used irony. Here are the two examples I've found so far:
Pair [...]. The term is most often used in international relations research, especially peace studies, where all dyads are examined to investigate the causes of war [...] It turns out there are few wars between Switzerland and Nepal.
Most work has been so mathematically uncompromising that neither politicians nor political scientists have understood it, nor have social choice theorists bothered to explain themselves.
The dictionary itself is very well written and I have found many interesting topics in it when I was studying for my exams and just had to take a break. I would usually start by looking up the topics I was studying and then just wander around until I realized again that I should be studying. Anyhow, my exams, and the fact that I ordered some other volumes of the Oxford Paperback Reference series should go in a different post.