RESOLVED
To my original question, how to "turn around" a glossary, this answer by Daniel provides a straight solution:
An admin should be able to extract a CSV list from a glossary with Custom SQL queries report and import that to spreadsheet. See contributed example.
P.S. The solution is not entirely satisfactory for me since I can't delegate it to our supporting staff - yes, unless I polish the custom SQL and provide an interface to the non-admin, etc. If the glossary had a CSV export function, the life would have been much easier. Unfortunately the glossary provides only XML export.