Idio_s

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Across
  1. 6. Face inevitable sharpness by bull teeth? messy (4-3-6)
  2. 7. English thunder rumbles; part of 8a, unwell (5-3-7)
  3. 8. Unhinged sweetheart Thor meets first to overcome (7-3-5)
  4. 9. Infrequently happens to be down, start to move on -or- Rare type of cheese is rumoured to be made of cheese (4-4)
Down
  1. 1. Speed study of the uncomplicated is not this (6-7)
  2. 2. Think twice, extremely risky being on (4-3)
  3. 3. Simple finishes into odd instruction to do slowly (4-4-2)
  4. 4. The titanic needed better introduction games (3-8)
  5. 5. Retire from success and sketch a mess? (3-3-4)