[Urwen]

Actually, Galadriel did the heavy lifting, but thank you!

This is a mirror password.

1. It was born where the fighter on the plain was healed. (1)
2. Where the sorrowful one was undone. (2)
3. The joyous one's name came from here. (3)
4. A line of defense was here. (4)
5. Green, and one of the six. (3)
6. The nine first parted ways on its shores. (2)
7. It claimed the father of the forementioned three.(1)

You'll be familiar with clue 1, Huinesoron. And 2, and 3, and there is that pesky 7 too. And I know the answers to every one of them.