Nip over before the dance for an arcade game (7)
I believe the answer is:
pinball
'for an arcade game' is the definition.
(I've seen this in another clue)
'nip over before the dance' is the wordplay.
'over' is a reversal indicator.
'before' is a charade indicator (letters next to each other).
'the dance' becomes 'ball' (ball is a kind of dance).
'nip' back-to-front is 'pin'.
'pin'+'ball'='PINBALL'
(Other definitions for pinball that I've seen before include "Slot machine bagatelle" , "Arcade game where a metal sphere negotiates hazards" , "Slot-machine game" , "Game involving an enclosed table, played by operating flippers" , "It may require tilting when played" .)