Answer:

EINS

Answer	Crossword Clue
EINS	Ones, in Berlin
EINS	Zwei leader
EINS	Nuremburg number

EINS	German one
EINS	..., zwei, drei
EINS	One in Bonn
EINS	German ace?
EINS	Half of zwei
EINS	"Zwei" preceder
EINS	".., zwei, drei"
EINS	Zwei halved

EINS	Hessian one
EINS	One in Weimar
EINS	One, in Oldenburg
EINS	Start of a German series
EINS	One overseas
EINS	Frankfurter's one
EINS	Drei minus zwei
EINS	One on an autobahn?

EINS	.., zwei, drei ...
EINS	One, to Beethoven
EINS	A tenth of zehn
EINS	German opener
EINS	Zwei from drei
EINS	Drei from vier
EINS	One abroad
EINS	German unity

EINS	Weimar one
EINS	One, in Cologne
EINS	One, to some
EINS	Stuttgart single
EINS	One, in Bonn
EINS	Fifth of fünf
EINS	Hamburger's one
EINS	One, to Goethe

EINS	Almost null?
EINS	Zehn minus neun
EINS	German number
EINS	Nuremberg number
EINS	"Drei" minus "zwei"

Crossword

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