Possible Clues:

• A janitor may have a big one
• A super's might have several attachments
• ''Double loop'' device
• Most important phone-call - a lot may hang on it
• Means to access here?
• Gaoler's holder
• A super's may be supersized
• Grey ink (anag)
• Pants attachment, perhaps
• Pitch used by league, and a place for lockers