Finish work – steal (5,3)
I believe the answer is:
knock off
I believe this clue is a double definition.
'finish work' is the first definition.
(I've seen this before)
'steal' is the second definition.
(I know that knock off is a kind of steal)
(Other definitions for knock off that I've seen before include "Do quickly" , "Butcher" , "finish work" , "call it a day" , "stop, > take away and > kill > pirate" .)