A Mystery Worth Solving

123456789101112
Across
  1. 3. (cryptic) bird like (5)
  2. 5. Joyful(8)
  3. 6. Rise Up (4)
  4. 7. Large Pile (8)
  5. 8. Celebration (8)
  6. 11. Contemporary (7)
  7. 12. Buoyant (5)
Down
  1. 1. Impressive (9)
  2. 2. Victory (7)
  3. 4. Astonish (8)
  4. 9. Heat (7)
  5. 10. preposition (2)