Answer: stalactites

AnswerCrossword Clue
STALACTITESMammoth hangings?
STALACTITESCertain roof hangings
STALACTITESDowners?
STALACTITESThey hang from the roof
stalactitesA tapering structure hanging like an icicle from the roof of a cave, formed of calcium salts deposited by dripping water
stalactitesSTALACTITE, a roughly conical or icicle-shaped speleothem that hangs down from the roof of a cave