Answer:

aine

Answer	Crossword Clue
AINE	Elder or senior: French.
AINE	Elder: French.
AINE	Senior: French.

AINE	Elder: Fr.
AINE	Elder, in Paris.
AINE	Senior: Fr.
AINE	Eldest: Fr.
AINE	Eldest, in France
AINE	Senior, in France
AINE	First-born, in Nice
AINE	Senior, in Paris

AINE	Senior on the Seine
AINE	Senior, in Saint-Etienne
AINE	Pierre's oldest son
AINE	Eldest, in Colmar
AINE	Eldest, to Yves
AINE	Eldest, to Voltaire
AINE	Elder, in Arles
AINE	Eldest, in Essonne

Crossword

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