Beginning to develop (7)
'beginning to develop' is the definition.
(nascent means developing or new)
This is the entire clue.
(Other definitions for nascent that I've seen before include "Freshly generated" , "starting to happen" , "Dawning" , "Starting existence" , "Incipient" .)
(Other definitions for budding that I've seen before include "Potential" , "Showing signs of talent" .)