How many letters does the top answer for “the act or practice of jesting.” have?

The most common answer is jocantry (8 letters).

Crossword clue: the act or practice of jesting.

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

jocantry 8 letters web-def

The act or practice of jesting. [Obs.]

the act or practice of duping. 50% similar → dupery

the act or practice of poisoning. 50% similar → venefice

the act or practice of regrating. 50% similar → regratery