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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Spy writing 4 letters:

CODE: Spy writing
CODE: Spy's writing
CODE: Spy's writing, perhaps
CODE: What a spy may write in
SECRETCODE: Spy's writing
SECRETCODE: What a spy might write or crack
SILVA: Daniel who writes the Gabriel Allon spy novels