We actually had some sun yesterday. Woohoo! In celebration...this puzzle
All answers are contained by the letters "sun".
Example: underground (12)
SUbterraneaN-1. Stevie Wonder song released in 1972 (12)
-2. append (7)
-3. call (6)
-4. type of bridge (10)
-5. synopsis (9)
-6. eschew (4)
-7. endure (7)
-8. satellite locations in an electrical grid used to transform voltage (10)
-9. it could be sawed off (7)
-10. hypothesis (11)
-11. abrupt (6)
-12. ruler in some Muslim countries (6)
-13. Trapper John or Pierce (7)
-14. dumbfound (4)
-15. early Japanese military dictator (6)
-16. word with cup or pump (7)
-17. insinuation (10)
-18. an advance payment made to receive or participate in something (12)