Is raised by practically strict nun (6)
I believe the answer is:
sister
'nun' is the definition.
(Sister is an example)
'is raised by practically strict' is the wordplay.
'raised by' is a reversal indicator.
'practically' means to remove the last letter.
'strict' becomes 'stern' (I've seen this before).
'is' backwards is 'si'.
'stern' with its final letter taken off is 'ster'.
'si'+'ster'='SISTER'
(Other definitions for sister that I've seen before include "habits' - one who has them" , "trade union member?" , "Resist about the sibling" , "Female relation" , "Nurse, nun and sibling" .)