Bigbands

6 clues
Swing players
Swing set players?
Groups of swingers?
Swing Era ensembles
Pre-WWII musicmakers
Sinatra backers, sometimes
Similar answers:
Abandship
Abcislands
Abigbangmay
Abrahamandsarah
Acastofthousands
Adamsgrandson
Alands
Aleutianislands
Allandsundry
Allhands
Allhandsondeck
Allislands
Ambands
Amenstands
Ampersands
Ands
Andsaid
Andsam
Andsara
Andsavingsomeof