Why, thank you!
1. Riddle, note, loses identity in the confusion.
2. Something Peter Pan does, we hear and see!
VANYAR: Literary uncle needs liquid.
4. Approximately two pints, note! Shake it up! Start early!
5. Killed chaotically around the fricative.
Edit: R, like L, is classed as a liquid, because it rolls off the tongue (just as P and B are plosives).
'Uncle Vanya' is a play by Chekhov.
Litre is correct for nearly two pints, but the note is rather more musical.
[This was edited in before I saw Hs's next post].