Beano is a clown in Ankh-Morpork's Fools' Guild. He knew Boffo, and was killed by Edward d'Eath in Men at Arms in order to steal his identity. His funeral is shown, but his body is found later on in a sewer called the "Cloaca Maxima". It was of course d'Eath.
On Roundworld, The Beano is a long-running comic (started in 1938), with some hugely memorable characters. It takes its name from a "beano", colloquial English (well, in the '30s, at least) for a good time, usually a day out, a variation of 'beanfeast'.