How many letters does the top answer for “the state or quality of being inadmissible, or not to be received.” have?

The most common answer is inadmissibility (15 letters).

Crossword clue: the state or quality of being inadmissible, or not to be received.

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

inadmissibility 15 letters web-def

unacceptability as a consequence of not being admissible

the quality or state of not being defensible. walsh. 50% similar → indefensibility

the state of not being 50% similar → nonbeing

the state or quality of not being deficient. strype. 50% similar → indeficiency