1. €=€×2? ( might be for the better to tell one how to do it!) (6,4,5) ?????? ???? ?E???
2. In contrast to what the United Nations favour (6)
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3. A knotted strand in your jeans, we hear, and backtracking is where you'll find it! (10) ?????????E
4. Once given the brush-off at home, many are now dab hands as such! (9) ?C???????
5. Sounds like the study if fishy jokes, which is nonsense (8) ?????O??