Finish work on street (4)
I believe the answer is:
stop
'finish' is the definition.
('stop' can be a synonym of 'finish')
'work on street' is the wordplay.
'work' becomes 'op' (abbreviation for opus).
'on' is a charade indicator (letters next to each other).
'street' becomes 'st'.
'op' put after 'st' is 'STOP'.
(Other definitions for stop that I've seen before include "Withhold large amount raised" , "Wind up" , "Refrain from" , "Intercept" , "Plug; cease" .)