Cryptic crossword No 3,933

Across

1. Newton left group for hour with spanner (6)
2. Get up and cruise with pilot (7)
3. Behaviour of one surrounded by dicks (6)
4. To be very interested - especially at first - in scholarly introduction (7)
5. Analyse speed of light, to get distance (6)
6. Stupid Eastender's replying (8)
7. Rope wound around middle of leg slips off, leading to heavy fall (8)
8. It could be left in error (3)
9. Sit across from Spooner to assess new spouse (8)
10. Call to receive agreement from Spaniard - it's coming up (6)
11. See 24d
12. Hang out in 13a (3)
13. Location of affair is legally kept secret (4,4)
14. I revolve around cover (8)
15. Artist requires short trip after conflict (6)
16. Turn me rich! Net-worth hollowed out along with ginger family member (8)

Down

1. Pattern of wind that's coming round again - groan loudly, then call for enema! (8)
2. Scandinavian settler has money lender's interest - family imprisoned (6)
3. Stronghold in East regularly delivers ten year stretch (7)
4. Shake-up in a UK lab reaching a peak (8)
5. They blow up some diesel again (5)
6. Changing course and mocking justice to become victor (7)
7. Broadband for rock group? (7)
8. Platforms demanding angriest nuts! (8)
9. Accepted kiss from Gaelic employee - extremely high point (6)
10. Continue with summary (6)
11. King perhaps, who famously played princess? (6)
12. Area where lecturer leaves donuts with indignation after shout-out (5,6)
13. Muck about with Iona? He's getting to grips with future wife (8)
14. Old spirits imbibed at the outset - made woozy at heart, somewhere over Scotland (7)