Crossword Genius

Gone bad (4)

Ross

There are a few possibilities for this:

Which length description are you looking for?:

3

4

6

(Other definitions for sour that I've seen before include "Turned - morose" , "Bitter, tart" , "Moody - acid" , "Acid, tart" , "Acid or caustic" .)

I've seen this clue in The Mirror and the Evening Standard.
Want a hint initially instead of a full solution? Install my app