Biblical word (4)
I believe the answer is:
unto
'biblical word' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for unto that I've seen before include "Heading for" , "To old" , "'The Lord said . . . . Moses'" , "'Do ... others, etc.'" , "Biblical preposition, the archaic 'to'" .)