Okay, I think it’s been >18 hours since the last guess. Here is another clue.
Clue #1. It concerns a disappointed pinniped.
Clue #2. This chart could apply

Clue #3: Although not part of the studio version, an element of this song is closely associated with another Iron Maiden song.
Clue #4: Bloody ‘ell, a fly’s gotten in ‘ere.
Clue #5. Wait, do you mean a feisty person or do you mean . . .?
Clue #6. Live, it has been a notable concert starter in the past. An intro that is not in the studio recording may be mistaken for being part of the song.
Incorrect answers:
The Reincarnation Of Benjamin Breeg, Transylvania, Rime Of The Ancient Mariner, Run Silent Run Deep, Moonchild, Lost In A Lost World, When Two Worlds Collide, Powerslave, Man on the Edge, Satellite 15... The Final Frontier, Holy Smoke, Bring Your Daughter To The Slaughter, Wasted Years, These Colours Don't Run, Mission From 'Arry.