How many letters does the top answer for “a spontaneous loss of consciousness caused by insufficient blood to the brain” have?

The most common answer is faint (5 letters).

Crossword clue: a spontaneous loss of consciousness caused by insufficient blood to the brain

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

faint 5 letters wn-def

pass out from weakness, physical or emotional distress due to a loss of blood supply to the brain

swoon 5 letters wn-def

pass out from weakness, physical or emotional distress due to a loss of blood supply to the brain