Answer: cipher

AnswerCrossword Clue
CIPHER

"Zxbrgd," probably

CIPHER

O

CIPHER

0, or a code

CIPHER
Written code
CIPHER
Thing to be cracked
CIPHERGo figure
CIPHERCoded message
CIPHEREncryption
CIPHERSolve by arithmetic.
CIPHERNonentity
CIPHERSecret writing
CIPHER0
CIPHERHard-to-read writing
CIPHERZero
CIPHERGoose egg
CIPHERGo figure?
CIPHERMessage written in a secret code