Fun and games; ode to joy!

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Across
  1. 1. she gets the giggles ALL THE TIME.
  2. 3. the namesake of the ‘g’ of mpg. See you at the pool.
  3. 6. biblical figure (I think); makes you think of Dover.
  4. 8. long shot, maybe, but I think they were born next to a pond??????
  5. 9. the first part of the double barrel takes me back to my days in a Lot subprefecture.
  6. 10. ‘no, sir; you’ve got the wrong student, AGAIN!’
  7. 11. a quiet force, Polish heritage? 50 shades of yellow.
  8. 13. I ran a marathon at the weekend; I have ACHES and pains all over, help !
  9. 14. poTAYtoes, poTAHtoes - same difference; hyphen!
  10. 16. wakey wakey, tongue twister.
  11. 17. one half of ‘et tu, Brutes?’
  12. 18. is she from North Africa?
Down
  1. 2. - Part 2 is in the title of a Seal classic, batman! Bisous.
  2. 3. Likely to say ‘come fly with me’? (like Frank Sinatra)
  3. 4. beware, liable to kill you with poison!
  4. 5. She’s probably chewing gum now; umlaut, Deutschland!
  5. 7. If she were a Spice Girl, she’d be the G (triplets!)
  6. 12. rhymes with the way you want your steak cooked.
  7. 15. is she Angolan? You can’t spell.
  8. 16. fleur de ________