Spoils the acts (5)
I believe the answer is:
turns
This clue could be a double definition.
'spoils' is the first definition.
The definition and answer can be both acts as well as being plural nouns.
Perhaps you can see a link between them that I don't see?
'the acts' is the second definition.
(turn is a kind of act)
Can you help me to learn more?
(Other definitions for turns that I've seen before include "Changes direction" , "Starts" , "Bends" , "Rotations" , "Goes off" .)