Possible Clues:

• My acorn may generate a new word from first letters
• NATO's one friend in a million
• Radar, for example, showing China invading America
• RADA, for example, is a friend to millions
• Only letters from a friend during the morning
• Buddy's in America for the short term
• Associate engaged by American for Unesco, say
• SCUBA, for one
• In a minute, friend will show laser, for example
• Word formed from initial letters of other words.