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

Crossword clues for It's removed before pumping 6 letters:

GASCAP: It's removed to pump fuel
GASCAP: It's removed before pumping
GASCAP: Cover removed to pump fuel
GASCAP: Item removed at the pump
GASCAP: It's removed at the pump
GASCAPS: Things removed by pumps
GASCAPS: They're removed by pumps