Great clues, Urwen, and a very nice idea for a theme.
Here you are, then:
1. Edro! Or is it in Mordor's name?
2. Rossetti’s gentle exhortation. Or does it concern a looking-glass?
3. Uttered in Lothlorien. ‘Tis a winding path.
4. To do this or not is the question, thought Iluvatar.
5. I wonder, perplexed, at this urgency!
6. Pinter’s, Werenowska’s or Buffini’s? Whichever! Uttered by one at the Morannon.
EDIT: SO SORRY! I HAD MISSED OUT CLUE 1!