Birthday boy

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Across
  1. 6. Treat from Grasmere 11
  2. 7. Film released in 1971, are you feeling lucky? 5,5
  3. 10. Adores a Stone Circle [anag] 11
  4. 12. System design principle [acronym] 4
  5. 13. Circuit designer, maybe 8
  6. 14. Nickname at University (Ctrl, Alt + Delete) 6
  7. 15. La Serenissima 6
  8. 16. F1 backward, according to Murray
  9. 17. Elated 5
Down
  1. 1. Wallace's mechanic
  2. 2. Mr Benn's anniversay 5
  3. 3. He said, "If you want to master something, teach it" 7
  4. 4. Father of Radar minus the power 6
  5. 5. Uncle who influenced hoarding habit 8
  6. 8. Bright Fame 6
  7. 9. "Put some spirit into it", sumo phrase 8
  8. 11. 23 June, every year 9