Deleting a watchlist on Arihant Plus is really simple and quick.  

• Open the Arihant Plus mobile app on your device. 
• In the footer menu, look for the Watchlist option. Tap on the Watchlist option, and a pop-up will show up. 
• Inside the pop-up, you will find "Manage Watchlist" section. Select it and you'll see a list of your watchlists. 
• To delete a specific watchlist, simply locate the "x" button next to it. 
• Tap on the "x" button, and voila! The watchlist will be deleted. 

You can also follow the GIF here to delete a watchlist.