Pity the girl (4)
I believe the answer is:
ruth
This clue is a double definition.
'pity' is the first definition.
(synonyms)
'the girl' is the second definition.
(girl's name)
(Other definitions for ruth that I've seen before include "Babe -, US baseball player" , "Old word for pity, or Bible book" , "- Rendell, Eng. writer" , "Girl's name - compassion" , "Pity - grief - Old Testament book" .)