Enquiries and replies

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Across
  1. 5. a complete list of items that people can look at or buy
  2. 7. in addition
  3. 8. if
Down
  1. 1. to become an expert in a particular area
  2. 2. the most recent
  3. 3. provide
  4. 4. the most important or successful
  5. 6. a request to make or supply goods