How many letters does the top answer for “good-natured tolerance of delay or incompetence” have?

The most common answer is longanimity (11 letters).

Crossword clue: good-natured tolerance of delay or incompetence

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

longanimity 11 letters wn-def

good-natured tolerance of delay or incompetence

patience 8 letters wn-def

good-natured tolerance of delay or incompetence