Totally above my head - but once solved, very close to my heart.
Good password! Hope you enjoy this one:
1. Battles are now mostly internal. Except for this one.
2. It reeled, it belched; the Ring was squelched.
3. Describes the Third Age, by the final sentence.
4. As foretold, the crownless becomes it. But add a sleepy town and end up here? Sounds like it!
5. Wrecker, starting on igloo and/or its library? All very confused. Mentioned in lineage, to stake a claim.
6. He goes where they might call him this? Perhaps unlikely, perhaps not – but an apocryphal letter will thus address his namesake.