Crossword Genius

Said ‘marsupials’ with regrets (4)

Ross

I believe the answer is:

rues

I'm a little stuck... Click here to teach me more about this clue!

'regrets' is the definition.
('rue' can be a synonym of 'regret')

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for rues that I've seen before include "Is sorry for - plants" , "Regrets, to be sure" , "Bemoans" .)

I've seen this clue in the Sydney Morning Herald.
Want a hint initially instead of a full solution? Install my app