While building your word search, you'll notice your words appear highlighted in the preview with a red circle — this is just to help you see how the puzzle is taking shape and won't appear on your finished puzzle.
Once you've finished adding your words, here's how to get to the clean, answer-free version:
Click Publish when your puzzle is ready
If you don't have an active subscription, you'll be prompted to purchase one at this point
Once published, you'll be taken to your puzzle page
On the puzzle page, use the Show Answers / Hide Answers toggle to switch between the two views
Download the version you need — hide answers for the student copy, show answers for your teacher copy.