Copy/Paste Siri answer to other app
iPad Pro 12.9-inch Wi-Fi, iOS 12.1
The new Shortcuts application includes a “Copy to Clipboard” action.
I have no personal experience with this app, but it’s very likely the key to your solution.
Yes, this turns out to be a possible solution. After spending much time learning how to make a shortcut and make a rudimentary spelling copy/paste, it can work. But it is FAR too clunky. My productivity gets interrupted already to have to look up a spelling when autocorrect can’t do it, the shortcuts just add a lot of hastle over a simple press and hold copy/paste operation.
It sounds like you’ve already invested the time to learn the shortcut. Creating, implementing and using it should take trivial time by comparison.
Copy/Paste Siri answer to other app