How many letters does the top answer for “a man newly married, or just about to be married.” have?

The most common answer is bridegroom (10 letters).

Crossword clue: a man newly married, or just about to be married.

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

bridegroom 10 letters web-def

a man who has recently been married

a married man, or a man newly married. 75% similar → benedick, benedict