"Singin' in the Rain" name (4)
I believe the answer is:
gene
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">singin' in the rain name</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 gene that I've seen before include "and 16 Down: Rockabilly singer" , "Hereditary unit on chromosome" , "- - Kelly, dancer" , "Something got from parent < for boy" , "DNA unit" .)