Crosswordiee.com

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

Crossword clues for Blah-blah-blah 7 letters:

PRATTLE: Blah-blah-blah
GAB: Blah-blah-blah
YAPPED: Went "blah-blah-blah"
IDLEGOSSIP: Blah-blah-blah