How many letters does the top answer for “write down quickly without much attention to detail” have?

The most common answer is scrabble (8 letters).

Crossword clue: write down quickly without much attention to detail

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

scrabble 8 letters wn-def

a board game in which words are formed from letters in patterns similar to a crossword puzzle; each letter has a value a

scribble 8 letters wn-def

write down quickly without much attention to detail