How many letters does the top answer for “characteristic of informal spoken language or conversation” have?

The most common answer is colloquial (10 letters).

Crossword clue: characteristic of informal spoken language or conversation

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

colloquial 10 letters wn-def

characteristic of informal spoken language or conversation

conversational 14 letters wn-def

characteristic of informal spoken language or conversation