Coming into being (7)
(Other definitions for arising that I've seen before include "becoming manifest" , "Coming up for discussion" , "Stemming from like committee matters, or getting up" , "occurring" , "on the horizon" .)
'coming into being' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for nascent that I've seen before include "awakening" , "Beginning to develop, embryonic" , "starting to mature" , "being developed" , "Promising potential" .)
'coming into being' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for emergent that I've seen before include "Newly independent" , "Breaking" , "Rising" , "In the process of coming into prominence" , "Suddenly appearing" .)