Crossword Genius

Is sure upset at having done wrong! (4)

Ross

I believe the answer is:

rues

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

'having done wrong' is the definition.
I can't tell whether this defines the answer.

'is sure upset' is the wordplay.
'upset' indicates an anagram.
'sure' with letters rearranged gives 'RUES'.

'at' acts as a link.

Can you help me to learn more?

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

Want a hint initially instead of a full solution? Install my app