Igneous/sedimentary hybrid? crossword clue

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Clue: Igneous/sedimentary hybrid?
Answer: COMBINATIONROCK
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Wrong answer?
Sometimes one clue can have more than one possible answer. For example, the clue “Wall Street buys” can have 3 answers: SHARES, BONDS, STOCKS found on these crosswords: Eugene Sheffer (Sept. 6, 2014), Newsday (Aug. 14, 2012) and New York Times (May 25, 2010)