Crossword clue: a horny material from the upper jaws of certain whales; used as the ribs of fans or as stays in corsets

The most common answer is baleen (6 letters).

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

Possible answers

baleen 6 letters wn-def

a horny material from the upper jaws of certain whales; used as the ribs of fans or as stays in corsets

whalebone 9 letters wn-def

a horny material from the upper jaws of certain whales; used as the ribs of fans or as stays in corsets