Hands and teeth do it, 6 letters
Hold tight, as a fist, 6 letters
Something to do with your teeth, 6 letters
Squeeze together tightly, 6 letters
Tighten, like a jaw, 6 letters
A small slip noose made with seizing, 6 letters
The act of grasping, 6 letters
Came to grips with?, 8 letters
Like a threatening fist, 8 letters