I haven't done one of these in SO long, I figured it was about time :)
Beat About the Bush
Why do we say that a person who avoids the issue is "beating about the bush"?
In many forms of hunting it's necessary, in order to find the game, to follow it into the underbrush, beating the bushes and making a din to scare the animals out. A person afraid of the animals lurking there will "beat about the bush", pretending to go in to find and kill the beast, but not actually doing so. (Why Do We Say It? pg 30)