think-do tank
n.— «Now he runs a consultancy that he described as the first Brussels “think-do tank,” and which rivals say is a lobbying firm masquerading as a research institute.» —“Lobbying Brussels: It’s getting crowded” by Dan Bilefsky in Brussels, Belgium International Herald Tribune (Paris, France) Oct. 28, 2005. (source: Double-Tongued Dictionary)
Further reading
Understanding the varieties of conversational styles can mean the difference between feeling you’re understood and being insulted. “High-involvement” speakers interrupt or talk along with someone else to signal their enthusiasm...
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...