Period of enforced isolation (10)
I believe the answer is:
quarantine
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">period of enforced isolation</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(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" .)