How many letters does the top answer for “establish something as being earlier relative to something else” have?

The most common answer is antedate (8 letters).

Crossword clue: establish something as being earlier relative to something else

3 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

antedate 8 letters wn-def

establish something as being earlier relative to something else

foredate 8 letters wn-def

establish something as being earlier relative to something else

predate 7 letters wn-def

establish something as being earlier relative to something else