Develop (5)
(Other definitions for unfold that I've seen before include "Spread out or become visible" , "'O clouds, - - !' (Blake)" , "Open out or reveal gradually" , "Spread out - reveal gradually" , "Ensue; straighten" .)
'develop' is the definition.
(evolving is a kind of developing)
This is the entire clue.
(Other definitions for evolve that I've seen before include "Reveal a secret" , "Grow slowly" , "Slowly change" , "Develop or change very gradually (6)" , "Unfold" .)
'develop' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for grow that I've seen before include "Become bigger" , "Gain in size" , "Develop - propagate" , "Get bigger" , "Swell" .)
'develop' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ripen that I've seen before include "Become ready to pick" , "Become mature" , "Come to maturity like fruit" , "Become ready for harvesting" , "Grow mature like fruit" .)