Possible Clues:

• It may have made Reeves's verse accessible
• Old man's weapon that's needed to get into base
• Like to uphold power with weapon, one admits
• Requirement for logging in
• Such as Open Sesame
• Fool rejected brand name to gain entry
• Term of admission that had previously been agreed
• What's in dad's scabbard? Keep it secret
• Old man's weapon that'll secure one's access
• Eg, open sesame