How many letters does the top answer for “of animal or plant; having both male female reproductive organs” have?

The most common answer is hermaphrodite (13 letters).

Crossword clue: of animal or plant; having both male female reproductive organs

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

hermaphrodite 13 letters wn-def

one having both male and female sexual characteristics and organs; at birth an unambiguous assignment of male or female

hermaphroditic 14 letters wn-def

of animal or plant; having both male female reproductive organs

having male and female reproductive organs in the same plant or animal 78% similar → monecious, monoecious, monoicous