How many letters does the top answer for “a song in celebration of a marriage. drayton.” have?

The most common answer is prothalamion (12 letters).

Crossword clue: a song in celebration of a marriage. drayton.

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

prothalamion 12 letters web-def

a song in celebration of a marriage

prothalamium 12 letters web-def

a song in celebration of a marriage

a song in celebration of a marriage 75% similar → prothalamion, prothalamium