How many letters does the top answer for “to raise by hawking, as phlegm.” have?

The most common answer is hawk (4 letters).

Crossword clue: to raise by hawking, as phlegm.

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

hawk 4 letters web-def

diurnal bird of prey typically having short rounded wings and a long tail