Aerial spectrum (7)
I believe the answer is:
rainbow
(Other definitions for rainbow that I've seen before include "colours in the heavens" , "Spectral display" , "Light effect in sky" , "Polychromatic arc" , "Natural multicoloured arc" .)
I believe the answer is:
rainbow
(Other definitions for rainbow that I've seen before include "colours in the heavens" , "Spectral display" , "Light effect in sky" , "Polychromatic arc" , "Natural multicoloured arc" .)