Crossword clue: twice; -- a word showing that something is, or is to be, repeated; as a passage of music, or an item in accounts.
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
a heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as