i_e, y, igh, i, ie

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Across
  1. 1. The weather conditions in an area over a long period
  2. 3. A piece of land surrounded by water
  3. 5. To cause strong feelings of enthusiasm
  4. 6. The time of day just after sunset
  5. 7. Exactly alike in every way
  6. 8. Fashionable and elegant
Down
  1. 2. Shaped like a three-sided figure
  2. 4. Slanting line connecting non-adjacent corners