A bit of leave (4)
I believe the answer is:
part
I believe this clue is a double definition.
'a bit of' is the first definition.
'leave' is the second definition.
(parting means leaving or separating)
(Other definitions for part that I've seen before include "Divide; role" , "unemployed actor hopes for" , "Piece; divide" , "Piece, segment" , "character on > stage" .)