Like a typical flight from New York to London

SEVENHOUR

Think of how long you’d nap crossing the Atlantic at 35,000 feet.

A typical flight from New York to London takes about seven hours, so the clue is simply describing the duration. The answer "SEVENHOUR" combines the number "seven" with "hour" to spell out the length of the trip directly. There’s no hidden wordplay—it’s a straightforward definition where the answer matches the literal meaning of the clue.