Puzzling stuff with Conserving Canvas

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Across
  1. 4. Sucked out airmail (two words)
  2. 6. Name of royal do(r)g(i) that possibly almost bit Juri, a real jaw breaker
  3. 7. Magical reptile that Rachel loves
  4. 10. Discovering how a stretcher works (two words)
  5. 11. P + (anthony - nthony) + ul
Down
  1. 1. Flexing the painting's muscles
  2. 2. Unsure royal horse with a yellowish or tan coat with primitive markings, also slang for not knowing (two words)
  3. 3. Is Lynne picking up the Beach Boys vibes? (two words)
  4. 5. Sticking together (not another Brexit joke;)
  5. 8. A product based on EVA co-polymers, Laropal K80, Cellolyn 21 and paraffin wax
  6. 9. A popular worktop (two words)