Song and dance advertisement (6)
I believe the answer is:
ballad
'song' is the definition.
(ballad is a kind of song)
'dance advertisement' is the wordplay.
'dance' becomes 'ball' (ball is a kind of dance).
'advertisement' becomes 'ad' (short for advert).
'ball'+'ad'='BALLAD'
'and' is the link.
(Other definitions for ballad that I've seen before include "Slow sentimental song" , "Slow romantic song" , "Narrative song of popular origin" , "Poem telling a story" , "Folk song" .)