Leave; divide (4)
I believe the answer is:
part
This clue is a double definition.
'leave' is the first definition.
(parting means leaving or separating)
'divide' is the second definition.
(I know that divide can be written as part)
(Other definitions for part that I've seen before include "Some; break" , "Region" , "Piece, segment" , "Piece; divide" , "unemployed actor hopes for" .)