"Later!"

IGOTTAJET

Think of Elvis Presley’s famous farewell phrase that sounds like someone rushing to catch a flight.

The clue "Later!" hints at a casual farewell, but the answer "IGOTTAJET" plays on the phrase "I gotta jet," a slangy way to say you're leaving in a hurry. It’s a pun where "jet" sounds like "get" but also references a fast departure, like catching a plane. The answer drops the "a" for brevity, fitting crossword style while keeping the meaning intact.