Answer: killtime

AnswerCrossword Clue
KILLTIME

Shop in airport stores, say

KILLTIME

Do a sudoku puzzle or two, perhaps

KILLTIME

Twiddle one's thumbs

KILLTIME
Dawdle: 2 wds.
KILLTIME
Emulate the idler.
KILLTIMEIdle
KILLTIMEPlay solitaire, perhaps