Clare, in Clare and the Reasons, is Clare Muldaur, daughter of Maria and Geoff. Here she sings in defense of Pluto, the little put-upon planet that scientists say may not actually rate being called a planet. Listening to the French version, “Pluton,” on her MySpace page, with its dreamy use of a theramin sound, I get a sense that this was intended to be the missing final part of Holst’s suite The Planets, which was composed before Pluto had been discovered.