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

Crossword clues for Pot boilers:

STOVES: Pot boilers
RANGE: Pot boiler?
STOVE: Pot boiler
CRONE: Pot boiler in "Macbeth"
LOBSTERS: Pot boilers?
FREELANCEWRITER: Relative of a pot-boiler expert.