Cutting and pasting

How do I cut a passage from an existing track and then re-use it on a completely track?

For instance, if doing a Retail Sample, how can I cut a 4 min section from an existing chapter … and then re-use that same clip in the Retail Sample. I’m trying to avoid re-recording the section if I don’t have to.

Copy & paste (like a word-processor), or duplicate the selection
https ://manual.audacityteam.org/man/edit_menu_copy_paste_and_duplicate.html

To delete, (after making a copy), see … Edit Menu - Audacity Manual