Please share your store URL and Screenshot.
So that I will check and let you know the exact solution here.
Hi, can you try the following:
Go to Themes > Customize > Theme actions (bottom left corner, just below Theme settings) > Edit Code.
Then search for Sections > Product-template.liquid and search for product.description
Next, comment out the block of div code which is just outside this item. If it does not solve your problem, try commenting out the block of div code just outside of it and so on. I think after 2-3 comments, you'll get what you are looking for. If you can share the theme you are using, I may be able to help you better.