The term 'clear sky' can be described by the following crossword solutions: AZURE (5 letters), ETHER (5 letters), BLUE (4 letters), STARRY (6 letters), Etheric (7 letters), Haziest (7 letters), and ETR (3 letters). AZURE is a bright, cyan-BLUE color, often associated with the sky. ETHER is a hypothetical substance believed to fill the universe beyond the earth's atmosphere. BLUE is a primary color that is also associated with the sky. STARRY is an adjective used to describe a night sky filled with stars. Etheric is an adjective used to describe something that is ethereal or otherworldly. Haziest is an adjective used to describe something that is foggy or misty. ETR stands for Eastern Time Zone, which is the time zone in which the sun rises and sets earliest.