GRAND Tour 
Heavy metal IRON [I seem to remember a rock group called Iron Maiden.]
Base melody TAPS
Big finish, and what the first words of the answers to starred clues can be GRANDFINALE [The word GRAND can be, but that's only part of the grid entry; GRANDFINALE cannot be, for example, a modifier of SLAM. What the theme entry means to say is that the first word of this answer can be the first word of the answers to the starred clues: GRAND + SLAM, etc.]
