How to beat a opposition full-back on the wing:

Wingers often have to beat that man before delivering a cross so its important to have 1v1 skills in your locker. Drive at the defenders feet at an angle with a laces dribble.

Fake inside and then explode out an deliver a cross. Key element is the fake and exploding out giving you the time to whip in that cross. Work off both feet and try other 1v1 skills for variation.