Possible Clues:

• Too young still for the part of the major
• Polo's so engrossing, or one's not part of the main group
• Its members are outnumbered
• There are less of us in it
• Immature state most people are never in
• The few, not the many
• It's a small world perhaps not being part of mainstream
• Less than half of processed iron on the object in well
• Iron, it was forged in my childhood
• Smaller part