Ready to eat (4)
'ready to eat' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ripe that I've seen before include "At fruition" , "Ready (to be eaten or used)" , "Mature for eating like fruit" , "Mellow" , "'Fully grown, ready to be eaten (4)'" .)
(Other definitions for mature that I've seen before include "Old film star" , "sensible" , "Grown-up" , "Ripen or grow up" , "Full-grown - ripe" .)