Publicity for dance and song? (6)
I believe the answer is:
ballad
'song?' is the definition.
(ballad is a kind of song)
'publicity for dance' is the wordplay.
'publicity' becomes 'ad' (short for advert).
'for' means one lot of letters go next to another (I've seen this in other clues).
'dance' becomes 'ball' (ball is a kind of dance).
'ad' after 'ball' is 'BALLAD'.
'and' is the link.
(Other definitions for ballad that I've seen before include "Narrative poem or song" , "Simple song or poem" , "romance" , "Poem telling a story" , "Song that tells a story" .)