Quit strike force (4)
I believe the answer is:
kick
This could be a double definition.
'quit strike' is the first definition.
'kick' can be an answer for 'strike' (thesaurus). I'm not sure about the 'quit' bit.
'force' is the second definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps there's an association between them I don't understand?
Can you help me to learn more?
(Other definitions for kick that I've seen before include "Stop" , "Gratification" , "Propel with the foot" , "Strike with foot" , "sudden acceleration" .)