How to exclude text from child elements?

How to?
#1

I'm trying to extract the text of the main element, but don't want to include the text from the child elements of that element.

Now I get this result: "Text that I want!Text to exclude"

<p class="parent-class">
Text that I want!
<a href="www.URL.com" class="arrowlink">
<span class="child-class">Text to exclude</span>
</a>
</p>

I have tried something like this:
p:not(:has(.child-class))

Does anyone know if it is possible to exclude the text from the child element?

#2

This can be done with regex, but you'll need to provide the real Html or web page to get better suggestions.