Yes, you can exclude specific track groups when creating a Grouped track group by using the Include only tracks not found in the selected track groups checkbox.

To exclude track groups, go to Manage > Track Groups and create a new Grouped Track Group. Select the track groups you want to exclude from the Track group group list, then tick Include only tracks not found in the selected track groups. This will include all tracks except those from the selected groups.

For example, to create a "Music Only" track group, select your "Jingles", "Adverts", and "Station IDs" track groups and enable the checkbox. This gives you all tracks except those from the excluded groups. Similarly, you could create a "Daytime Safe" track group by excluding "Explicit Content" and "Late Night Only" groups.