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

Crossword clues for Busy beaver:

GNAW: Be a busy beaver, say
GNAWER: Busy beaver
DAMS: Busy beaver's buildings
DAMS: Beaver business
DOER: Busy beaver
GNAW: Be a busy beaver
DAM: One keeps a beaver busy
ASA: Busy ___ beaver
DAM: Beaver's business