How many letters does the top answer for “in an early stage of development” have?

The most common answer is embryonic (9 letters).

Crossword clue: in an early stage of development

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

embryonic 9 letters wn-def

in an early stage of development

shed at an early stage of development 75% similar → caducous

the early stage of growth or development 75% similar → infancy

the beginning or early stages 50% similar → oncoming, onset