Answer:

curtain

Answer	Crossword Clue
CURTAIN	Sun block
CURTAIN	Theater need
CURTAIN	"Behind the ...," by John Gunther.

CURTAIN	Play's finale.
CURTAIN	Last word of a play script.
CURTAIN	Backdrop.
CURTAIN	Stage direction.
CURTAIN	Acknowledgment of applause

Crossword

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