Answer:

EVE

AnswerCrossword Clue
EVE12-24, for one
EVEActress Arden
EVEArden of "Our Miss Brooks"
EVECain raiser
EVEFirst lady
EVEFirst mate?
EVEGenesis name
EVEHoliday preceder
EVENight before
EVENighttime before
EVESecond person
EVESeth's mom
EVE12-31, e.g.
EVEA snake charmed her
EVEBefore time
EVEPlanning time
EVESeth's mother
EVEShe raised Cain
EVEThree-faced one of film
EVEApple picker
EVEEdenite female
EVEMs. Arden
EVENew Year's or Christmas follower
EVEWife without in-laws
EVEShe had no mother
EVEFall woman
EVEPlaywright Ensler
EVE"riverrun, past ... and Adam's, from swerve of shore to bend of bay": James Joyce
EVETime for wrapping, often
EVEActress Alice of "Star Trek Into Darkness"
EVEDecember 24, e.g.
EVENight prior
EVEFestive night, often
EVEBrink
EVEFirst offender?
EVEMother of
EVEAnticipatory time
EVENight for celebration
EVEOpposite WSW
EVEThe night before