Even laments unusual subjugation (11)
I believe the answer is:
enslavement
'subjugation' is the definition.
(I know that enslavement is a type of subjugation)
'even laments unusual' is the wordplay.
'unusual' indicates anagramming the letters.
'even'+'laments'='evenlaments'
'evenlaments' is an anagram of 'ENSLAVEMENT'.
(Other definitions for enslavement that I've seen before include "Joseph was sold into it" , "Complete subjugation" , "Putting into bondage" , "Loss of freedom in captivity" .)