Sing, Swiss-style (5)
I believe the answer is:
yodel
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sing swiss-style</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 yodel that I've seen before include "Sing in intermittent falsetto" , "Sing partly falsetto" , "Loftily call" , "Sing using falsetto" , "Sing (Swiss style)" .)