State of equilibrium
I believe the answer is:
stasis
'state of equilibrium' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for stasis that I've seen before include "Period of inactivity" , "Stoppage of circulation or stagnation" , "Assist in state of stagnation" , "Secret police force's" , "Period of equilibrium" .)