Parted from (6)
I believe the answer is:
bereft
'parted from' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for bereft that I've seen before include "Deprived of something precious" , "Deprived, perhaps of reason (6)" , "Sad through loss or deprivation" , "Pained by the loss of someone" , "Deprived, say of reason" .)