To make a clean Spotify playlist, you need to add songs that are labeled as clean or have no explicit content. Here are the steps to do so:

1. Open Spotify: Launch the Spotify app on your mobile device or computer.

2. Create a new playlist: Click on the "Library" or "Your Library" tab, then select "Playlists". Click on "Create Playlist" or the "+" icon, then name your playlist.

3. Search for clean songs: Use the search bar to find songs. Songs labeled "clean" or "radio edit" are usually free of explicit content.

4. Add songs to your playlist: Click on the three dots next to the song, then select "Add to Playlist". Choose your clean playlist. Repeat this step until you've added all the songs you want.

5. Review your playlist: Go through your playlist to make sure all songs are clean. If you find a song with explicit content, click on the three dots next to the song and select "Remove from this Playlist".

Remember, Spotify does not have a specific filter for clean songs, so you'll need to manually ensure that the songs you're adding to your playlist are clean versions.