Breasts (5)
I believe the answer is:
bosom
'breasts' is the definition.
(I have seen 'Female breasts ' mean 'bosom' so perhaps 'breasts' could also mean 'bosom')
This is all the clue.
(Other definitions for bosom that I've seen before include "Embrace" , "Chest; very close (friend)" , "Female breasts" , "5 [BUST]" , "Woman's chest" .)