Possible Clues:

• Barefoot discipline
• Chopper's activity
• Sport whose belt levels, from beginning to advanced, appear in the starred answers
• Discipline in Bruce Lee movies
• Japanese cousin of kung fu
• Catherine shackles artist in sport
• Artist seized by girl in combat
• Kind of chop Katherine ate really awful at first
• Woman adopting a king’s method of self-defence
• Martial art that will debut at the 2020 Olympics