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

Crossword clues for Unimportant thing:

HILLOFBEANS: Unimportant thing
TRIFLE: Unimportant thing
STRAINEDATAGNAT: Fussed over unimportant things
TRIFLES: Unimportant things