Sure, I can guide you through the process of making a Spotify playlist available for offline listening.

1. Open your Spotify app on your phone or tablet.
2. Go to "Your Library" at the bottom right corner of your screen.
3. Select "Playlists".
4. Choose the playlist you want to download.
5. Once you're in the playlist, you'll see a toggle switch named "Download". Turn it on.
6. The songs will start to download and will be available for offline listening.

Remember that you'll need to be on a Premium Spotify subscription to use the offline listening feature. Also, be sure to connect to Wi-Fi before downloading to avoid using up your mobile data.