Cut off, set apart (7)
I believe the answer is:
isolate
I believe this clue is a double definition.
'cut off' is the first definition.
(both can mean to separate from others)
'set apart' is the second definition.
(synonyms)
(Other definitions for isolate that I've seen before include "Segregate or quarantine" , "Separate and keep away from other people" , "Cause to be alone" , "Put into quarantine" , "Set apart from others" .)