Possible Clues:

• Reformist Ann could turn out to be a pioneer
• First name or odd name for borderline personality?
• Pioneer priest on island adopting strange rites
• Border dweller
• Daniel Boone, for one
• Father supported by ranks a lot, mostly a pioneer
• Borderline character with impudence remains wild
• Priest on island adopts bogus rites: his position is borderline
• TV presenter secures unexpected rise for pioneer
• Davy Crockett's man having row with sergeant major in the buff?