Creating clean playlists on Spotify is a great way to ensure that you're only listening to the music that suits your taste or situation. Here's how you can do it:

1. **Create a New Playlist**: Open Spotify and click on the "New Playlist" button at the bottom of the left sidebar. Give your playlist a name, and optionally, a description and cover image.

2. **Add Songs**: Browse or search for songs, albums, or artists. When you find a song you want to add, click on the "..." next to the song. Select "Add to Playlist" and then select your newly created playlist.

3. **Review the Lyrics**: Spotify now includes lyrics for many songs. You can review these to ensure the song is clean. Click on the song in your playlist. If lyrics are available, they will appear in the bottom right corner. Review the lyrics to ensure the song is clean.

4. **Use Spotify's Radio Feature**: Once you've added a few songs to your playlist, use Spotify's Radio feature to find similar clean songs. Right-click on your playlist and select "Go to Playlist Radio." As songs play, add the ones you like to your playlist.

5. **Repeat the Process**: Continue this process until you've built a playlist of clean songs that you enjoy.

Remember, the key to a clean playlist is reviewing the songs before you add them. It might be a bit time-consuming, but it ensures that you're only listening to music that meets your standards.