How many letters does the top answer for “a long and complicated and confusing procedure” have?

The most common answer is rigamarole (10 letters).

Crossword clue: a long and complicated and confusing procedure

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

rigamarole 10 letters wn-def

a long and complicated and confusing procedure

rigmarole 9 letters wn-def

a long and complicated and confusing procedure