Crossword clue: a work horse, or working ox.
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
to declare or affirm solemnly and formally as true
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
to declare or affirm solemnly and formally as true