Pity Boaz’s wife (4)
I believe the answer is:
ruth
I believe this is a double definition.
'pity' is the first definition.
(as opposed to ruthlessness)
'boaz's wife' is the second definition.
(biblical figure)
(Other definitions for ruth that I've seen before include "Girl's name and Old Testament Book" , "She is followed by Samuel" , "-- Rendell, novelist" , "Pity - grief - Old Testament book" , "Biblical Book with woman's name - a pity" .)