Answer:

firstborn

Answer	Crossword Clue
FIRSTBORN	Bart, among the Simpson kids
FIRSTBORN	Eldest
FIRSTBORN	Eldest.

FIRSTBORN	Cause for joy
FIRSTBORN	Like Cain
FIRSTBORN	Heir to a throne, typically

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.