How many letters does the top answer for “of or relating to or belonging to the diptera” have?

The most common answer is dipterous (9 letters).

Crossword clue: of or relating to or belonging to the diptera

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

dipterous 9 letters wn-def

of or relating to or belonging to the Diptera

belonging or relating to the willow. 50% similar → salicaceous

of or relating or belonging to a city 50% similar → civic

relating or belonging to the echinoderms. 50% similar → echinodermal