How many letters does the top answer for “hasty and without attention to detail; not thorough” have?

The most common answer is casual (6 letters).

Crossword clue: hasty and without attention to detail; not thorough

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

casual 6 letters wn-def

hasty and without attention to detail; not thorough

cursory 7 letters wn-def

hasty and without attention to detail; not thorough

perfunctory 11 letters wn-def

hasty and without attention to detail; not thorough