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Across 6. Underground station that wins a game on radio 4 programme (10, 7) 10. Hot meal from South American country (6) 11. Birthday game which could usurp the postman (4, 3, 6) 12. Bidet became Arc De Triomphe's mixed up payment type (5, 4) 14. Tea fed this loss (6) 15. Drink found in betters bit (4, 6) 16. Invincibles found in nerds potent horn (6, 5, 3) 17. OMD's plane, it should have stayed at home! (5, 3) 18. Victoria Coren concealed Roman Emperor (4)

Down 1. Shane Warne and Alistair Campbell are masters of this (4) 2. Apple's new device for ancient ruler (1, 8) 3. Top Barrister's garment making football club (12, 4) 4. It's stop start in this part of Dutch city (3, 5, 8) 5. Gaol has peculiar characteristics (11) 7. Kraftwerk's road (8) 8. Messed up awful chaps laden the vomit (4, 4, 3, 2) 9. Billy Ray's offspring uses this for demolition (8, 4) 13. Uninteresting fellow from Bristol or Gloucester area (6, 4) 17. These troublesome Spaniards shed a tear (3)