Have you done clicker training before? What are you planning to teach your chinchilla?
I think an actual clicker would get you better results, but a verbal marker can work.
I've done a lot of clicker training with dogs. I have not clicker trained a chinchilla (yet) but I have thought about it quite a bit. The process is much the same regardless of species.
Here is how I would do it:
Start by associating the click (or verbal mark) with a treat. Use something small and not loaded with sugar (I'd try rolled oats...a single oat per click). Click, treat, click, treat, click, treat. You might spend your whole first 2-5 sessions just associating the click with a reward.
Then pick a simple small behavior to start with, something the chinchilla does naturally. Say you want to teach your chinchilla to stand. The instant the front paws lift, click and reward. You can increase your criteria over time, but start small. Wait until the chinchilla seems to 'get it' by offering the behavior more frequently. Then wait to click until the chinchilla stands a bit taller (or does a bit more).
This could take days, weeks or months to get the desired behavior (depending on the chinchilla, your timing, and how complex the behavior is). The timing of the click is very important. If you haven't done clicker training before, look up videos on youtube for dog training that explain when to click.
Finally, (and here's partly why an actual clicker may work better) once chinchilla is offering the behavior as you want it ("the final product") you add your cue...the word that tells your chinchilla you want him to stand (or whatever). Up to this point you don't say anything. You just wait until the chinchilla does his/her thing and click to mark the exact moment the chinchilla does what you want and then you reward. Now you say your cue as the behavior is given. Click and reward. Then (after many repetitions/sessions) try to say it just before the behavior is offered...reward. And then (eventually) say it and wait for the behavior.
Again, associating a behavior with a word will likely take weeks or months with a chinchilla. Take it slow, keep sessions short...partly to keep it fun, partly to not overdue it on the treats, and partly to give the chinchilla more time to think about things.
You could probably teach the right chinchilla (people oriented, food motivated, and interested) how to do quite a few things: come, stand, jump on/off/into things, 'popcorn', stay (maybe), roll over.
