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

Crossword clues for Heckler, e.g. 4 letters:

PEST: Heckler, e.g.
PESTS: Hecklers, e.g.
CATCALLWITNESS: *Person sitting next to a heckler, e.g.?