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

Crossword clues for King David, for one:

HARPIST: King David, for one
IRA: One of King David's guards.
PSALMIST: King David was one.
IRA: One of King David's guard.
ASAPH: One of King David's choir.
IRA: One of King David's aides.
IRA: One of King David's men.