Greek goddess of youth (4)
I believe the answer is:
hebe
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">greek goddess of youth</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for hebe that I've seen before include "Herculean bride" , "Greek goddess of youth, wife of Hercules" , "Zeus's daughter; shrub" , "Olympian cupbearer - evergreen garden shrub" , "Youth personified" .)