Answer: runatab

AnswerCrossword Clue
RUNATABOwe for drinks
RUNATABDrink now, pay later
RUNATABOwe at the bar
RUNATABAgree to pay later
RUNATABOwe, in a way
RUNATABDefer payment, perhaps
RUNATABDrink on credit
RUNATABPut off paying, perhaps
RUNATABBe in the red for black and tans?
RUNATABPlan to pay at 2:00 a.m., say
RUNATABBuild up charges