How can we remove underwire caught outside the drum?

I havent opened your particular model, but mine (74520) cen be easily opened from the back (6 screws to remove the plate). You can then see a big rubber hose attached to the bottom of the drum housing. By removing this (open the big clamp on the hose) you should be able to detach it and reach into the housing and get the object out.

well as we say in my town you got a "toston" (plantain) is a very dificult job for you or for a tech I recomend you to call one or you gonna finish with many parts to make a waher....good luck