Mythical weeper (5)
I believe the answer is:
niobe
'mythical weeper' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for niobe that I've seen before include "figure of myth" , "Greek woman cast in stone" , "she wept for her children" , "Daughter of Tantalus, turned to rock" , "Tearful young woman" .)