Crossword clue: to grind with the teeth, and with a crackling sound; to craunch.
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
To grind with the teeth, and with a crackling sound; to craunch. [Prov. Eng. & Colloq. U.S.]