Part 1. Delete Individual Songs from iPad
Step 1. Launch the Music app on your iPad.
Step 2. Tap "Songs" on the bottom to see all of the music on the device. Choose the individual track you want to delete and slide your finger to the left across the songs.
Step 3. Tap on the red "Delete" button to remove music from your iPad.
Part 2. Delete All Songs from iPad
Step 1. Go to the iPad's homepage and tap on "Settings" icon.
Step 2. Tap "General" > Select "Usage" > Choose "Music." The iPad will display how much space is taken up by music on your device.
Step 3. Tap "Edit" button on the top-right > Tap the red icon next to All Music > Tap on "Delete" to remove all songs from iPad.
Part 3. Delete Selected Songs from iPad with AnyTrans
AnyTrans is an all-around iOS files manager that made to transfer and manage all your iPhone, iPad, and iPod content, such as, music, videos, photos, contacts, notes, messages, apps, etc. You can freely add or delete songs from your iPad with AnyTrans.
Step 1. Download and install AnyTrans on your computer. Run it, and connect your iPad to computer.
Step 2. On the homepage of AnyTrans > Click "Audio" > Select "Music".
Step 3. Highlight the songs you want to delete and click the trash icon on the top-right of this window to delete the unwanted songs.
Resource from: How to Delete Music from iPad
How to Delete Music from iPad in Three Ways