Song used to promote dance? (6)
I believe the answer is:
ballad
'song' is the definition.
(I know that ballad is a type of song)
'to promote dance?' is the wordplay.
I cannot really understand how this works, but
'dance?' could be 'ball' (ball is a kind of dance) and 'ball' is found within the answer.
The remaining letters 'ad' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'used' acts as a link.
Can you help me to learn more?
(Other definitions for ballad that I've seen before include "Narrative poem or song" , "A simple or old song" , "Lay, narrative song" , "Slow romantic song" , "Narrative song of popular origin" .)