How many letters does the top answer for “the quality of not conforming strictly to law” have?

The most common answer is illicitness (11 letters).

Crossword clue: the quality of not conforming strictly to law

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

illicitness 11 letters wn-def

the quality of not conforming strictly to law

not conforming to the law 60% similar → unlawfully

the quality of conforming to law 60% similar → lawfulness

not conforming to dietary laws 50% similar → nonkosher, terefah, tref