Are you asking how to clean them in the field or at home? This is how I do it.

Field cleaning a fresh kill: I grab a bunch of feathers just below the tail and pull. Sometime you can get some of the skin off but you want a half dollar size clearing of feathers. One hand grab the tail and the other just under the breast and pull enough to rip the skin (or use a knife and slice across the bird). Stick two fingers inside the bird to slowly pull the gizzard out. Almost everything will fall out then if you're careful. Detach the smaller instestines.

At home I just skin the bird.I take a sharp knife or cleaver and separate the wings at the first joint. Also the legs. A smaller bird just take the breast. Almost as easy as a chicken.