How do I write a good descriptive link, without ranking the linking page for the same keywords of the same article?
Let me try and understand your issue.
You have a page, lets call A:
www.example.com/blue-widgets/ and you have another page, lets call it B:
You want to link from A to B using anchor text which is relevent to B, but you are afraid if you use words that are relevant to page B, page A will start to rank for them.
You don't need to worry about this, simply using a few words won't change what the page is relevant for (unless there is no other content on the page?), and just adding a few words wont make it rank for those words.
So you can safely link from
www.example.com/red-widgets/ using an anchor such as
Check out our red widgets page