Related Clues:

• Sentry position
• Opinion piece
• Put in the mail
• College credit
• Entity
• Drop in the mail
• Affix for public notice
• Either end of a gate
• The "U" of BTU
• Apartment, to an apartment manager
• Mail delivery, to Brits
• One Adam Twelve, e.g.
• Monad
• Display, as a dean's list
• Peck, e.g.