Answer: bigbands

AnswerCrossword Clue
BIGBANDSSwing Era ensembles
BIGBANDSSwing players
BIGBANDSSwing set players?
BIGBANDSSinatra backers, sometimes
BIGBANDSGlenn Miller and Benny Goodman led them
BIGBANDSGroups of swingers?