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

Crossword clues for Eavesdrop, maybe:

AJAR: Set for eavesdropping, maybe
PRY: Eavesdrop, maybe
SPY: Eavesdrop, maybe
SNEAK: Eavesdropping sort, maybe
NOSIEST: Eavesdropping on the most conversations, maybe