Sing in Tyrolean fashion (5)
I believe the answer is:
yodel
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sing in tyrolean fashion</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 yodel that I've seen before include "Sing partly falsetto" , "Sing in high trilling tone like Swiss mountaineer" , "Sing in high pitch like Swiss mountain dwellers" , "Sing (Alpine folk music)" , "Sing in traditional Swiss manner" .)