How many letters does the top answer for “a literate person who can arrange items in alphabetical order” have?

The most common answer is alphabetiser (12 letters).

Crossword clue: a literate person who can arrange items in alphabetical order

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

alphabetiser 12 letters wn-def

a literate person who can arrange items in alphabetical order

alphabetizer 12 letters wn-def

a literate person who can arrange items in alphabetical order