Parse the selected iTunes tracks' Song Names such that the same first Item text in "First Item - Second Item - Third Item" is removed and copied to another user-selected tag in each selected track (Album, Artist, Composer, Genre, Grouping, or Comments), leaving "Second Item - Third Item" in the Song Name. Run the script again to similarly remove and copy "Second Item" to another tag, and so on. Read Me explains more, and how to customize for different separator characters. Screenshot speaks volumes.
Perhaps of Interest...
downloaded 10m 11s ago
Set the Plays of selected tracks.
downloaded 12m 22s ago
Two scripts copy text from clipboard to current or single selected track's lyrics tag
downloaded 28m 33s ago
View/Edit tags of selected track(s) in single window
downloaded 39m 36s ago
Renumber order of selected tracks
downloaded 49m 35s ago
Perform search-and-replace on text in your choice of tags
downloaded 1h 48m 49s ago
Re-associate batch of dead tracks with files from selected folder