Sam's Mini Cryptic

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Across
  1. 2. Open gift not sent secure (6)
  2. 4. Lead tenacious emissary negotiates new international support for sport (6)
  3. 6. Glitter not good for babies (6)
  4. 7. Crazy grandmas chase band members (7)
  5. 8. Break, regarding bitterness (7)
  6. 9. Thrash with golf comeback (4)
Down
  1. 1. Tomb empty: iconic or mysterious? (7)
  2. 3. Drunk ale invents lovers (10)
  3. 5. Audibly lie on cat (4)
  4. 7. Irritated bulge around rear-end or sack (6)