Winds up or winds down (4)
I believe the answer is:
ends
This clue is a double definition.
'winds up' is the first definition.
(I've seen this in another clue)
'winds down' is the second definition.
(I've seen this in another clue)
(Other definitions for ends that I've seen before include "Stops in dens" , "Extremities" , "Objectives, purposes" , "designs" , "Final parts" .)