Knack lost by leader on the hustings - tribal language? (5)
I believe the answer is:
sioux
'knack' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for sioux that I've seen before include "Native American of Minnesota, perhaps" , "Native American people" , "N. American natives" , "American Indian tribe" , "in Dakota" .)