How many letters does the top answer for “the act of transgressing; the violation of a law or a duty or moral principle” have?

The most common answer is evildoing (9 letters).

Crossword clue: the act of transgressing; the violation of a law or a duty or moral principle

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

evildoing 9 letters wn-def

the act of transgressing; the violation of a law or a duty or moral principle

transgression 13 letters wn-def

the act of transgressing; the violation of a law or a duty or moral principle