In yesterday’s EP, there was the following clue:
23 across: Discussion about Pluto’s route (9)
The answer, as far as I could work it out, is pluto’s route = di’s course = discourse = discussion.
The problem I have is that I can’t think of any connection between pluto and di. Is there one? Or did EP make the mistake of thinking Diana, who is the goddess of the moon, is the goddess of Pluto?