Crossword clue: a part of male dress in front of the breeches, formerly made very conspicuous. shak. fosbroke.
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
(15th-16th century) a flap for the crotch of men's tight-fitting breeches