Spectrum (7)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">spectrum</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for rainbow that I've seen before include "Polychromatic arc" , "weather feature" , "heavenly sight" , "'I can sing a - - ' (song)" , "Arc of colored light in the sky" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">spectrum</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for gamut that I've seen before include "Complete extent or range" , "Ambit" , "Entire range" , "Entire scope" , "Compass, scale" .)