Rhapsody in Blue composer (8)
I believe the answer is:
gershwin
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rhapsody in blue composer</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for gershwin that I've seen before include "Ira and George, US brother composers" , "Ira -; US lyricist" , "US composer" , "I Got Rhythm composer" , "SECOND PART OF 14" .)