How many letters does the top answer for “earnest and conscientious activity intended to do or accomplish something” have?

The most common answer is attempt (7 letters).

Crossword clue: earnest and conscientious activity intended to do or accomplish something

attempt, effort, endeavour, try.

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

attempt 7 letters wn-def

make an effort or attempt

effort 6 letters wn-def

earnest and conscientious activity intended to do or accomplish something

endeavour 9 letters wn-def

earnest and conscientious activity intended to do or accomplish something

try 3 letters wn-def

make an effort or attempt