Sing in a heartily poetic way? (5)
I believe the answer is:
yodel
'sing' is the definition.
(I know that yodel is a type of sing)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for yodel that I've seen before include "Sing in high trilling tone like Swiss mountaineer" , "Sing partly falsetto" , "Sing like the Lonely Goatherd?" , "Practise Alpine singing" , "Alpine warble" .)