Before dance, trap game (7)
I believe the answer is:
netball
'game' is the definition.
(netball is a kind of game)
'before dance trap' is the wordplay.
'before' says to put letters next to each other.
'dance' becomes 'ball' (ball is a kind of dance).
'trap' becomes 'net' (net is a kind of trap).
'ball' after 'net' is 'NETBALL'.
(Other definitions for netball that I've seen before include "Team game/sport" , "Game for women or girls" , "activity no longer associated solely with girls" , "Team game for tall Ben" , "After this, you get to serve again" .)