Possible Clues:

• Eg, eg
• Shortening - above Britain (anag)
• Above Britain, flying for USA, say
• A shortened word
• RAF, for example, scrambled above Britain
• Flying bishops about to board plane, for example?
• Shortened form of a word or phrase
• E.g. for example?
• Britain above changing short form
• In not so many words, it's one of the cutbacks in the literary world