Goddess of youth (4)
I believe the answer is:
hebe
'goddess of youth' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hebe that I've seen before include "Greek goddess of youth, wife of Hercules" , "Youth personified" , "Olympian cupbearer - evergreen garden shrub" , "Goddess of youth and flowering shrub" , "Herculean bride" .)