Everyone in punt coming to Swan Lake? (6)
I believe the answer is:
ballet
'swan lake?' is the definition.
(I've seen this in another clue)
'everyone in punt' is the wordplay.
'everyone' becomes 'all' (all people).
'in' means one lot of letters goes inside another.
'punt' becomes 'bet' (punt can mean a bet).
'all' going within 'bet' is 'BALLET'.
'coming to' is the link.
(Other definitions for ballet that I've seen before include "Classical dancing style" , "Art of the Kirov or Bolshoi" , "Eg, Swan Lake" , "old madrigal" , "The theatre of dance" .)