Across

1. Fast aircraft

3. Had gone

5. Steamed grain

6. New thought

8. Professor (abbr.)

11. A cheer

12. Carry

15. Smile broadly

16. Enthusiasm

17. Do as told

18. Take a seat

Down

1. An all terrain vehicle

2. Singing threesome

3. Heaviness

4. A hot drink

7. To go out

9. Lion sound

10. Wild excitement

13. Hooting birds

14. Not west

15. Sticky stuff