Related Clues:

• Original ally crosses boundary
• Main; make usable
• Sort of scream as mate goes over the edge
• First; primitive
• Type of fear
• Original and very proper - walk inside
• Original border claimed by China?
• PR sending mail-out first
• Original friend taking in skirt
• Put in charge
• The best time of one's life is brief
• This number is!
• A very good brief
• Really good brief
• Prepare to fire first