How many letters does the top answer for “a vehicle with wheels drawn by one or more horses” have?

The most common answer is carriage (8 letters).

Crossword clue: a vehicle with wheels drawn by one or more horses

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

carriage 8 letters wn-def

a vehicle with wheels drawn by one or more horses

equipage 8 letters wn-def

a vehicle with wheels drawn by one or more horses