Subjugation (11)
I believe the answer is:
enslavement
'subjugation' is the definition.
(I know that enslavement is a type of subjugation)
This is the entire clue.
(Other definitions for enslavement that I've seen before include "Loss of freedom in captivity" , "Putting into bondage" , "Complete subjugation" , "Joseph was sold into it" .)