Separation from ethnic origin (10)
I believe the answer is:
extraction
This clue is a double definition.
'separation' is the first definition.
(extraction is a kind of separation)
'ethnic origin' is the second definition.
(I've seen this before)
'from' is the link.
(Other definitions for extraction that I've seen before include "Dental operation" , "breeding" , "Descent" , "Removal; lineage" , "Ethnic origin" .)