1) Become blue again 2) Become cloudless 3) Become fair 4) Become less cloudy 5) Become sunny 6) End the reign of rain 7) Explain to perfection 8) Explain well 9) Free from disorder 10) Fully explain 11) Go from cloudy to fair 12) Go from gray to blue 13) Make orderly 14) Remove confusion from 15) Resolve Found on https://www.crosswordclues.com/clue/clear-up