Dealt flippantly (with), 5 letters
Played around (with), 5 letters
Played cat and mouse (with), 5 letters
Played, as a cat with a mouse, 5 letters
Treated indifferently, with with, 5 letters
One who's not playing seriously, 5 letters
Cats, vis-a-vis mice, 6 letters
Cats, with yarn or mice, 6 letters