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

Crossword clues for W.W. I novel ... hinted at by 17-, 24-, 52- and 64-Across 15 letters:

AFAREWELLTOARMS: W.W. I novel ... hinted at by 17-, 24-, 52- and 64-Across