Crossword Genius

Accumulate charges . . . or what you must do to answer four clues in this puzzle (3,2,1,3)

Ross

I believe the answer is:

run up a tab

I've seen this clue in The New York Times.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.