"A Chorus ___" (4)
I believe the answer is:
line
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">a chorus</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for line that I've seen before include "Wrinkle; phone link" , "Wrinkle, boundary" , "dash one end to the other" , "Row - occupation" , "Formation of one beside another" .)