Possible Clues:

• Issue of Atlas covering situations in Eastern state
• Kuala Lumpur locale
• One song is about entering mother country
• Academic poems originally introducing a federation
• SE Asian state
• Sail a yam, strangely, to the Asian state?
• Sarawak's locale
• SE Asian nation
• Big rubber exporter
• Get to the country from the continent, around the end of July after Malachy