After you finish clicker conditioning, your bird understands that they hear a click and they get a treat. You then train them the real first behavior they get treats for doing.
You can do this with an ordinary chopstick (don't use a dirty one, make sure it's unused and keep it around for bird use only obviously), you'll probably want a few extra chopsticks to keep around in case your bird ruins one or they get lost.
This is a video of some of the process with my budgie Duke:
http://www.youtube.com/watch?v=0RFnBnVRe5AIt's kind of a long, tedious process to teach them to target but well worth it. I would make sure your bird is motivated for treats. This usually means don't feed them for only a few hours, and then take them out to try this.
You start by showing the bird the stick. If it's curious, it might touch the stick itself, but if it isn't, you'll kind of need to force it the first time. You want your bird to gently beak/nip the very end/tip of the stick. When they do, you click and give them their treat.
If they're not interested, you'll need to put it up close to their beak. They might touch it by accident. Reward this anyway! If they don't touch it at all, and are completely uninterested, force them to touch it by touching their beak gently with the stick. Don't chase your bird around with the stick or they're gonna get scared.
You slowly want to increase the distance. After putting it right up close to their beak a few times, put it far enough away that they have to turn their neck to reach it. Then repeat that a few times. Then a step away. Then a few steps away. And on and on.
Mix it up. Target in different directions and at different heights. Don't let your bird figure out a pattern. It isn't a dance. The only consistent thing should be touching the target stick.
Only reward for them touching the end of the stick, don't reward if they touch the middle. This will help in the long run. This might take a few training sessions or it might only take one or two. Wait it out if your bird is not immediately responding to the stick. They might eventually go and reach for it. Don't move it closer immediately if they're not moving to get it. If that happens, put the target stick behind you and don't give the bird any attention. Then, try it again and maybe put the stick a little closer this time instead.