Related Clues:

• They make up the alphabet
• Characters, those with tenants?
• What children learn early: they can get through a door without opening it
• Mail; characters
• Tenants may have to deal with such correspondence
• Trestle (anag.); settler (anag.)
• Correspondence excluding girl and mother from legal matters
• What has five or two more itself?
• This clue has nineteen
• Q and A?
• Culture perhaps found in V&A?
• Parts of the alphabet
• Landlord's post
• Learning three Rs possibly
• Literal meaning initially suggests correspondence