Please can anyone help with 7d and 9d.
There is an extra letter in the clue OR an extra letter in the answer.
7d Slay opponent - it'll improve your surroundings - I have AIR_O_
9d Observe riparian dweller casting line (4) - I have NOT_
I cannot make sense of either message (I have 6,8,?,6 and 4,5,?,7) but can see three possible names in the grid.
Is this from some well-known work about v's which has passed me by???
Thanks in advance for any hints