River in SW Australia that flows to the Indian Ocean below Perth (4)

I believe the answer is:

swan

(Other definitions for swan that I've seen before include "Large aquatic bird" , "Large, long-necked bird" , "black, in 7th" , "Royal bird" , "Mute, whooper or Bewick's bird" .)

I've seen this clue in The Mirror.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.