Possible Clues:

• Group of newspapers covering one country with no leader in administration
• Mouthpiece is first American tenor that is charged for arrangement
• Establishment gains ground in formal speech
• Running over before Saigon train's off
• Assembly speech in which I sang out
• Running company
• Company talk about fantastic gains
• Firm with The Irish Times, for one
• Society for solemn music is in need of last five characters in 22 across
• Establishment newspaper is into a restructuring