Gordy's Fathers Day Cryptic Crossword

12345678910
Across
  1. 4. secret to good networking (6,5)
  2. 8. a flat din for sport? (6,6)
  3. 9. a ballistic achievement (7,6)
  4. 10. well placed relief whilst walking (3,6)
Down
  1. 1. jingle is not the avenue (6,6)
  2. 2. pleasurable costal village with racoons (6,4)
  3. 3. crimes unravel in untaxed jumper (8)
  4. 5. Bernoulli agrees with F=ma (5,3,5)
  5. 6. sounds deeply fish-like (4)
  6. 7. Jills friend is a soft flutter (4,6)