Hi Johny,

Sorry, I don't quite get what do mean by here. Can you elaborate more on this? perhaps with some screenshots might help a lot

This field

Yes, you can add your custom css which you would like to make your own blogger page styling look different than other, you can check my attached screenshot below.

Hope this will help.

No, whether interests me perhaps to clean this field

Hello Johny,

Sorry but don't quite understand you here. What do you mean by "clean this field"?

To remove this field from a form in general

Hi Johny,

Do you mean you want to remove the custom css in the profile edit? If yes, you can setting it:
1. Click ACL>Choose Joomla Group>Profile>Disable-Allow custom css: https://www.screencast.com/t/Fd0TlZtJJ8

Thank you, it's ok!

Hi there,

You are most welcome. Glad to hear that your issue has been resolved now.

As a gentle reminder, kindly start a new thread if you have any other issue in the future so it will be easier for us to manage your inquiry. I will lock and mark this thread as resolved.