Possible Clues:

• Clan leader
• One newt in file is the leader
• Tribal leader
• Clan boss caught robber moving tons by road to Edinburgh
• Head of clan requires cook to admit one before volunteers get in
• Designed a niche fit for a clan leader
• Clan leader had murderer and thief ordered to be imprisoned
• Clan leader, one with thin face, suffering injury
• 'Hello' taken in by, possibly, nice fat leader
• Leader I abandoned, losing lead in succession