Not necessarily turning your foot out.  9-11 degree turnout is the range.
Creating torque through the hip.

A couple episodes and a Pro Episode to check out.
Episode 250: Creating Loaded Hip Stability and Torque
Squat Quick Test: Is it Tight Ankles or Tight Hips?
Pro Episode: Squatting or Pulling? Feet Are the New Black.

Roop and Jami did a 5 part series on the foot and ankle.