That particular hold is easily defeated in two ways (at least).
1~ ‘Hollow out’ strong side; take a medium to large step at a 45 degree angle outward to the rear, while Keeping your balance. At the same time, pulling arm into your body as best you can. Pulling the attacker off balance just a bit, go for an eye gouge aiming for the bridge of the nose. Your thumb will side into one of the eyes, worse case you will miss and break your thumb. If that happens or not follow up with a upward palm strike to the base of the chin.
2~ Again ‘hollow out’ as above, rotate your fist to the center of the body through and downward the attackers arm (thumb side) this will break the grip and your strong side is free to defend yourself as fit.
I hope that made sense, I’m not great describing things in print. I’m more of a “grab my arm” kinda guy.
