Answer:

lettres

Answer	Crossword Clue
LETTRES	Belles-...
LETTRES	Belle ....: fine writing
LETTRES	Belles ....

LETTRES	... de cachet (sealed missives).
LETTRES	Belles-....
LETTRES	... de cachet
LETTRES	Belles -.....

Crossword

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