It's possible to upload both a clean and explicit version of a song within the same release. To do so, you can utilize the "Explicit lyrics" section of the upload form for an explicit track, and the "Add version info to song title?" section for a "Clean" or "Radio Edit" version of a track.

Marking a Track as Explicit

You can mark an explicit track as such on the upload form under the "Explicit Lyrics" section.

Doing so will indicate the track as explicit within its metadata for services.

Marking a Track or Album as a Radio Edit

You can mark a clean version for a track without the explicit tag by specifying that it's a "Radio Edit" on the upload form. Please note that this should be used if you are also releasing an explicit version of the same track. If the original track is not explicit, you can just mark the track as not explicit in the "Explicit Lyrics" section.

To mark a track as a radio edit, use the "Add version info to song title?" section of the upload form and click on the "Radio Edit" option. This will designate the track as a non-explicit version of the original explicit track.

If you're uploading the clean version of an entire album, add the radio edit version information by formatting the album title as "Album Title (Radio Edit)."