Untoward preposition? (4)
I believe the answer is:
unto
'preposition?' is the definition.
(I've seen this in another clue)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for unto that I've seen before include "To old" , "Biblical preposition, the archaic 'to'" , "'Do ... others, etc.'" , "Archaic form of to" , "'The Lord said . . . . Moses'" .)