Swish wrote a
solo cleric's guide awhile back. It only goes to 50, but so does Green (initially).
The bigger picture is that no, Clerics are not good soloers, at least relative to clases that are traditionally considered "good soloers". Nukes are just a lot less efficient than DoTs or Charms, and other classes that can fear (SKs, Rangers, Necros) can all do more damage while that fear is going. This means soloing clerics will have a lot (more) downtime.
You
can solo a cleric; it will just be slower than soloing a Bard/Druid/Enchanter/Magician/Necromancer/Shaman. Heck, they'll even be slower than a Wizard (maybe not at early levels when everyone's a Warrior, but the Wizard nukes are more efficient, and then quadding is even more efficient).