Crossword Puzzle Early period of civilization

Clue: Early period of civilization

Leaves the office early? (RESIGNS with 7 letters)
Early TV offering (GMA with 3 letters)
Early offspring (CAIN with 4 letters)
Area of early civilization (FERTILECRESCENT with 15 letters)
Early period (e.g. IRONAGE with 7 letters)
Early metalworking period (IRONAGE with 7 letters)
Early Atari offering (PONG with 4 letters)
Early developmental period (IRONAGE with 7 letters)
Early hour periods (AMS with 3 letters)
Offers breakfast to students before first period? (BRINGSHOMEROOMTHEBACON with 22 letters)