Answer:

sister

Answer	Crossword Clue
SISTER	Nun
SISTER	Sorority member
SISTER	One of the Pointers

SISTER	Nun, to a nun
SISTER	"Two Mules for .. Sara"
SISTER	Cordelia, to Regan
SISTER	Kind of ship
SISTER	One with a habit
SISTER	Rock's Twisted ..
SISTER	Woman with a habit?
SISTER	Moon Unit, to Dweezil

SISTER	Convent address
SISTER	Orderly type?
SISTER	Cordelia, to Goneril
SISTER	Abby, to Ann
SISTER	Order title
SISTER	Rock band Twisted ...
SISTER	Ann, to Abby
SISTER	Many a bridesmaid

SISTER	Nun, to another nun
SISTER	Venus, to Serena
SISTER	Family member
SISTER	Nun's title
SISTER	Title for a nun
SISTER	Certain sibling
SISTER	Female family member
SISTER	Phoebe, to Mnemosyne

SISTER	... Carrie.
SISTER	Relative.
SISTER	Dreiser's Carrie.
SISTER	One of same kind.
SISTER	Edith Sitwell to Sacheverell.
SISTER	Nurse Kenny's title.
SISTER	Girl.
SISTER	Family member.

SISTER	Eileen, for instance.
SISTER	Convent member.
SISTER	Familiar term of address.
SISTER	Head nurse, in Britain.
SISTER	Sibling.