Audio Cluster pane tabs are only found in Track panes.
Simply put, Audio Clusters are groupings of perfectly identical master recordings.
For instance, if a user duplicates a Tracks from a given Album by adding it to a new Album or Playlist, that Track's Audio Cluster will display two instances of the Track.
In other words, Audio Clusters allows users to know how many duplicates their catalog holds.
Audio Clusters are only based on the audio file imported into your account and not on the metadata itself. So without the imported audio files, we cannot calculate your Tracks’ Audio Cluster’s.