Mixed Bag

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Across
  1. 2. Major Asian river flowing through Phnom Penh
  2. 4. Female singing voice & fictional mob family surname
  3. 6. Motown group, 'Martha Reeves & the ...'
  4. 9. First Chancellor of West Germany, '... Adenauer'
  5. 10. US President's official helicopter, '... One'
  6. 12. Fictional desert planet in Frank Herbert's Dune novels
Down
  1. 1. Scorer of the winning drop-goal in the 2003 Rugby Union World Cup final
  2. 3. Common term for the clavicle
  3. 5. Tony Robinson's character in Blackadder
  4. 7. Former ground of Sunderland Association Football Club, '... Park'
  5. 8. Cohen Brothers' crime film starring Frances McDormand & Steve Buscemi
  6. 11. Containing or consisting of Iron