Game’s HQ leading dance (8)
I believe the answer is:
baseball
'game's' is the definition.
(baseball game is a kind of game)
'hq leading dance' is the wordplay.
'hq' becomes 'base' (HQ is headquarters).
'leading' is a charade indicator (letters next to each other) (some letters go in front of others).
'dance' becomes 'ball' (ball is a kind of dance).
'base'+'ball'='BASEBALL'
(Other definitions for baseball that I've seen before include "Sport played with a bat" , "Game played badly in the sable lab" , "Bale labs out for this game" , "Game played in sable alb?" , "Summer sport of US" .)