Answer: blackjacks

AnswerCrossword Clue
BLACKJACKSBillies' relatives.
BLACKJACKSClubs.
BLACKJACKSTwenty-ones
blackjacksA tarred-leather container used for alcoholic drinks
blackjacksA short, leather-covered, typically lead-filled club with a flexible handle, used as a weapon
blackjacksA gambling card game in which players try to acquire cards with a face value as close as possible to 21 without going over
blackjacksA pirate's black ensign