Is it a bird? Is it a plane?

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Across
  1. 4. It's the look of a saint in this era (5)
  2. 5. Spirit measures first of three in old image (5)
  3. 7. Where to find many small cones (6)
  4. 8. Salmon still mooing (4)
  5. 12. Shot at social function (4)
  6. 13. I looked and I found a club in Iran where you just ring and you're in (9)
  7. 14. See six Eastern women (4)
  8. 18. Cover swimming pool? Not entirely (3)
  9. 19. Insult doesn't start trivial (5)
  10. 20. No straightforward look for one of five children in street (6)
  11. 21. Way writing-fluid makes unpleasant smell (5)
  12. 22. Is the plover a retriever? (6)
  13. 25. See through the French and the heartless Normans (4)
Down
  1. 1. Watch same gender couples, we hear (4)
  2. 2. Falls about and cheers Queen show (8)
  3. 3. Twinkle in second-class bond (5)
  4. 4. Depressed star with range of knowledge (6)
  5. 6. An opening for a student (5)
  6. 7. Think like a mirror (7)
  7. 9. Female with great features (4)
  8. 10. Briefly disbelieve the foreign lookalike (6)
  9. 11. Graze forehead on edges of sabre (6)
  10. 13. Aviators calling on the fourth (5)
  11. 15. Sir, I returned flower (4)
  12. 16. Second-hand item?
  13. 17. They help to pick out good young women (7)
  14. 23. Pours when he takes the girl out (6)
  15. 24. Ginger is a communist (3)