Period of enforced isolation (10)
I believe the answer is:
quarantine
'period of enforced isolation' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for quarantine that I've seen before include "Compulsory isolation to prevent spread of disease" , "State of isolation" , "Isolate (to prevent spread of disease)" , "Precautionary seclusion" , "Period of enforced isolation" .)