How many letters does the top answer for “model of excellence or perfection of a kind; one having no equal” have?

The most common answer is nonesuch (8 letters).

Crossword clue: model of excellence or perfection of a kind; one having no equal

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

nonesuch 8 letters wn-def

model of excellence or perfection of a kind; one having no equal

nonsuch 7 letters wn-def

model of excellence or perfection of a kind; one having no equal