Answer: alphorn

AnswerCrossword Clue
ALPHORNColorful Swiss artifact.
ALPHORNSwiss instrument for signaling.
ALPHORNImprovised on harp, bringing in large wind instrument (7)
alphorna wooden horn used by Swiss herdsmen
alphornlong, powerful horn of wood or bark, with a cupped mouthpiece and a curved bell at opposite ends, used by Swiss herders and mountaineers