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idiombe clued up (about/on sth) BrEBrEknow sth to know all the facts that you need to know about a subject:Choosing the right sparkling wine can be a real problem, especially if you're not clued up on the different brands available.None of use were quite clued up enough to realize that Jethro Tull was a group, and not just the name of some Victorian farmer.
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