Possible Clues:

• Alan's the one who knows, by the sound of it
• One is a prescribed response to 'Name this child'
• Sniffer's left to pursue space agency
• Like some spray from back of catamaran when going over a lake
• Like the accent of US space admin figure?
• Sounds as if one knows it's like this
• One knows it sounds that way
• Like some country sounds
• Sarah at last knows this, by the sound of it
• Those in space left of central feature