General knowledge

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Across
  1. 2. entry direction (4) — DOWN
  2. 5. square (5) — BLANK
  3. 7. text hint used to solve an entry (5) — CLUE
  4. 8. entry direction (5) — ACROSS
  5. 10. a planet follows (5) — ORBIT
  6. 11. of planets and the sun (6,6) — SOLAR SYSTEM
Down
  1. 1. star of our system (3) — SUN
  2. 3. “Red Planet” (4) — MARS
  3. 4. you do to a crossword (5) — SOLVE
  4. 6. who makes crosswords (9) — SETTER/CONSTRUCTOR (either works; longer US term is “CONSTRUCTOR”)
  5. 9. word for “question” (8) — PROBLEM/QUERY (6 = QUERY; pick your preference)
  6. 12. with intersecting answers (9) — CROSSWORD