Large flightless bird of South America (4)

I believe the answer is:

rhea

(Other definitions for rhea that I've seen before include "Fast runner" , "Fertility goddess in ancient Greek mythology" , "Moon" , "South American flightless bird - mother of Zeus" , "Grounded bird" .)

I've seen this clue in The Times and The Sunday Times.

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.