Wind up good person before work (4)
I believe the answer is:
stop
'wind up' is the definition.
(I've seen this before)
'good person before work' is the wordplay.
'good person' becomes 'st' (saint).
'before' means one lot of letters go next to another.
'work' becomes 'op' (abbreviation for opus).
'st'+'op'='STOP'
(Other definitions for stop that I've seen before include "set of organ pipes" , "Hold on" , "Cease, halt" , "high card in bridge" , "Standstill" .)