Possible Clues:

• It features in table before a year is up -- like some schools?
• Easy
• Simple air possibly unknown by Arne? Not half
• No problem in Baker Street?
• Rudimentary; introductory
• Simple city housing oriental soldiers and sailor
• Preliminary manoeuvres alert enemy
• Easy as pie for copper, for example, on half a salary
• Three successive letters: AB ... why, it sounds like ABC!
• Introductory, simple