I must be getting even older and crustier than I thought. What a load of bolleaux.
Adverse yaw is caused by differential drag which (mostly, in this case) results from differential lift; adverse yaw is counteracted with rudder. The end.
Different aircraft require different amounts and timing of rudder input (personally, I found the Tiger Moth and Luscombe a bit tedious in this department) but the feet quickly learn what to do if the owner of the feet looks over the coming while making aileron inputs. A very good way to train the feet (or the owner of the feet) is to visually hold heading while banking one way and t'other at a range of speeds.
Apropos of not very much: as a guide, for smooth parting of the air molecules and non-spillage of drinks, the bank angle should equal approximately half the heading change.
HFD