Person of virtue accepting half of it (6)
I believe the answer is:
mortal
'person' is the definition.
(I know that person can be written as mortal)
'virtue accepting half of it' is the wordplay.
'virtue' becomes 'moral' (a moral value).
'accepting' is an insertion indicator.
'half of' means to take half the letters.
'it' with half the letters taken is 't'.
'moral' going around 't' is 'MORTAL'.
'of' acts as a link.
(Other definitions for mortal that I've seen before include "Causing death" , "Liable to cause death" , "Fatal" , "Subject to death, like all mankind" , "Sound a wound is deadly" .)