How many letters does the top answer for “one of the monera.” have?

The most common answer is moner (5 letters).

Crossword clue: one of the monera.

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

moner 5 letters web-def

the Mon-Khmer language spoken by the Mon

moneron 7 letters web-def

One of the Monera.