A poem, squarely.

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Across
  1. 3. In citation Pappa Pappa, and in time a great deal
  2. 7. Above a backwards refusal, you'll be on board.
  3. 8. A thousand applications, educated to show the way.
  4. 9. Emily's Corpus
  5. 10. rearranged trestles
  6. 12. As would a featherless boa, but an erudite one
  7. 14. Gordon Ramsey's pleasure principle is Sulferous
  8. 15. Tungston, Me? It'll work if you give me the skinny
  9. 16. Around the neck? How formal, Dave.
  10. 17. The German web, the cost of speeding, and Ted
  11. 18. In the afternoon a diphthong, as in onomatopoeia, for example
Down
  1. 1. An article, definately!
  2. 2. Before getting a tattoo, try fifty
  3. 4. A multiplicity of even quadrilaterals, or just a geek
  4. 5. Within a matched pair I never golf!
  5. 6. To bear the divide? It's a way over.
  6. 11. Formicdae, minus delta, with tea, as a conjunction
  7. 12. Cobalt, in paralell lines before the 15th of March
  8. 13. We want her, we found her, and now - united - we're going...
  9. 15. Whiskey in this locale