I believe that "Clicks to Page" is the number of page views that preceded the current page view (or maybe the number of page views until this point - most of the documentation seems to be gone.. it's likely a legacy field).
So within a Visit:
- Page 1 (Entry)
- Clicks to Page: 0 (or maybe 1)
- Page 2
- Clicks to Page: 1 (or maybe 2)
- Page 3
- Clicks to Page: 2 (or maybe 3)
- etc
This isn't a dimension I've ever used... I would imagine this could be used to see a distribution of how many pages were seen before hitting a specific page (this could be useful as a histogram maybe)...
But given it doesn't appear to be available in Workspace, I would be a little distrustful of it without doing an in-depth validation of it....