quartet

FOURSOME
List of words for the clue quartet from the crossword:
ABBA TRIO ALTO PAPAS VIOLA TIRES MAMAS FOUR CELLO ESSES ADELINE RAJ ABCD RSTU ENS ACES SEASONS RRS EMS UMPS
WordClue
QUEENDancing ... (Abba)
QUARTETfoursome
PARTquarter or half
AMETHYSTquartz variety