A lucrative page was ranking #3 in Google SERP's and 4 months ago the company used gclid tracking parameters.
This parameter became indexed in Google and the page has dropped down to #5 which has affected revenue and traffic.
We added a canonical tag and we updated the URL Parameter tool in Search Console but the gclid parameter is still indexed. We did not block it in the robots.txt file.
If we were to use the URL removal tool, is this high risk? Would it be likely that the clean URL will not replace the gclid URL and no result will return for this key term?