How many letters does the top answer for “at some indefinite time.” have?

The most common answer is somewhen (8 letters).

Crossword clue: at some indefinite time.

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

somewhen 8 letters web-def

At some indefinite time. [R.]

at some indefinite or unstated time 75% similar → sometime

an indefinite time in the future 50% similar → manana

to an indefinite extent; for an indefinite time 50% similar → indefinitely