Brackets

8 clues
???
Categorizes
Tax categories
Parentheses' kin
Tax chart divisions
March Madness concerns
March office pool entries
Tournament organizer's concern
Similar answers:
Abrac
Abracadabra
Abraceofbirds
Abraceofdentists
Abraclark
Agebracket
Airpockets
Allembracing
Anglebracelet
Anglebrackets
Apejackets
Applejackets
Baitbuckets
Baskets
Bearmarkets
Beckets
Beltandbraces
Blackmarketsheep
Blankets
Blanketsecurity