Solve these clues to fill the grid.
- A dark region of considerable extent on the surface of the moon
- 4 Across
- An indefinite or unknown location
- 6 Across
- The quality of being at a refreshingly low temperature
- 7 Across
- The series of events that form a plot
- 8 Across
- An airplane powered by one or more jet engines (plural)
- 9 Across
- A licensed medical practitioner
- 10 Across
- The present or immediately coming night
- 1 Down
- A Berber living in northern Morocco
- 2 Down
- Pleasing by delicacy or grace
- 3 Down
- Land of the free; the USA
- 5 Down
- Any of numerous elongate mostly marine carnivorous fishes with heterocercal caudal fins and tough (plural)
- 6 Down
- A coarse twilled cotton fabric frequently used for uniforms
- 7 Down