Note everyone at the dance (4)
I believe the answer is:
ball
'the dance' is the definition.
(ball is a kind of dance)
'note everyone' is the wordplay.
'note' becomes 'b' (musical note).
'everyone' becomes 'all' (all people).
'b'+'all'='BALL'
'at' is the link.
(Other definitions for ball that I've seen before include "Formal dance gathering" , "Social function for dancing" , "Formal social event" , "Party" , "Perhaps a bouncer < 's clog" .)